1st, sorry for my poor english...
2nd, as explained in title, I have 2 problems since last update, if you can help would be great 
To know, and if any additional information needed just let me know:
Version: 5.3 (build 4569) – October 25, 2015
Windows 7
Subsonic installed on external HDD, connected on USB port --> worked well till now
1- Podcast: I have only one podcast registered, but with lot of songs. Now when I click on "Podcast" icon on the top, then on the one I have registered i got this message: 230 episodes – Error Error on line 24: The entity name must immediately follow the '&' in the entity reference.
Of course now I can't check for new episode, getting same message.
2- Star songs & playlist: when I try to click on stars shortcut on the top, I have an error message with a log file. I paste it below:
P.S: Already uninstalled/installed, same problem
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org.springframework.dao.TransientDataAccessResourceException: PreparedStatementCallback; SQL [select media_file.id,media_file.path,media_file.folder,media_file.type,media_file.format,media_file.title,media_file.album,media_file.artist,media_file.album_artist,media_file.disc_number,media_file.track_number,media_file.year,media_file.genre,media_file.bit_rate,media_file.variable_bit_rate,media_file.duration_seconds,media_file.file_size,media_file.width,media_file.height,media_file.cover_art_path,media_file.parent_path,media_file.play_count,media_file.last_played,media_file.comment,media_file.created,media_file.changed,media_file.last_scanned,media_file.children_last_updated,media_file.present,media_file.version from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and media_file.present and media_file.type = ? and starred_media_file.username = ? and media_file.folder in (?, ?) order by starred_media_file.created desc limit ? offset ?]; S1000 General error java.lang.NullPointerException in statement [select media_file.id,media_file.path,media_file.folder,media_file.type,media_file.format,media_file.title,media_file.album,media_file.artist,media_file.album_artist,media_file.disc_number,media_file.track_number,media_file.year,media_file.genre,media_file.bit_rate,media_file.variable_bit_rate,media_file.duration_seconds,media_file.file_size,media_file.width,media_file.height,media_file.cover_art_path,media_file.parent_path,media_file.play_count,media_file.last_played,media_file.comment,media_file.created,media_file.changed,media_file.last_scanned,media_file.children_last_updated,media_file.present,media_file.version from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and media_file.present and media_file.type = ? and starred_media_file.username = ? and media_file.folder in (?, ?) order by starred_media_file.created desc limit ? offset ?]; nested exception is java.sql.SQLException: S1000 General error java.lang.NullPointerException in statement [select media_file.id,media_file.path,media_file.folder,media_file.type,media_file.format,media_file.title,media_file.album,media_file.artist,media_file.album_artist,media_file.disc_number,media_file.track_number,media_file.year,media_file.genre,media_file.bit_rate,media_file.variable_bit_rate,media_file.duration_seconds,media_file.file_size,media_file.width,media_file.height,media_file.cover_art_path,media_file.parent_path,media_file.play_count,media_file.last_played,media_file.comment,media_file.created,media_file.changed,media_file.last_scanned,media_file.children_last_updated,media_file.present,media_file.version from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and media_file.present and media_file.type = ? and starred_media_file.username = ? and media_file.folder in (?, ?) order by starred_media_file.created desc limit ? offset ?] at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:106) at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:607) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:641) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:666) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:698) at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:133) at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:137) at net.sourceforge.subsonic.dao.AbstractDao.namedQuery(AbstractDao.java:104) at net.sourceforge.subsonic.dao.MediaFileDao.getStarredDirectories(MediaFileDao.java:453) at net.sourceforge.subsonic.controller.StarredController.handleRequestInternal(StarredController.java:64) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265) at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107) at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149) at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at net.sourceforge.subsonic.filter.RequestEncodingFilter.doFilter(RequestEncodingFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at net.sourceforge.subsonic.filter.ParameterDecodingFilter.doFilter(ParameterDecodingFilter.java:54) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at net.sourceforge.subsonic.filter.BootstrapVerificationFilter.doFilter(BootstrapVerificationFilter.java:59) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442) Caused by: java.sql.SQLException: S1000 General error java.lang.NullPointerException in statement [select media_file.id,media_file.path,media_file.folder,media_file.type,media_file.format,media_file.title,media_file.album,media_file.artist,media_file.album_artist,media_file.disc_number,media_file.track_number,media_file.year,media_file.genre,media_file.bit_rate,media_file.variable_bit_rate,media_file.duration_seconds,media_file.file_size,media_file.width,media_file.height,media_file.cover_art_path,media_file.parent_path,media_file.play_count,media_file.last_played,media_file.comment,media_file.created,media_file.changed,media_file.last_scanned,media_file.children_last_updated,media_file.present,media_file.version from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and media_file.present and media_file.type = ? and starred_media_file.username = ? and media_file.folder in (?, ?) order by starred_media_file.created desc limit ? offset ?] at org.hsqldb.jdbc.Util.throwError(Unknown Source) at org.hsqldb.jdbc.jdbcPreparedStatement.executeQuery(Unknown Source) at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:648) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:591) ... 61 more