This problem seems isolated to windows phones. I got the same error using both apps on my 8x while iSub on my ipad works fine. Here's a sample log.
[2013-01-27 21:54:56,385] DEBUG RESTController - got request net.sourceforge.subsonic.controller.RESTController$2@125b21a, [id] = 2442
[2013-01-27 21:54:56,392] DEBUG StreamController - got mfId = 2442 from param null
[2013-01-27 21:54:56,397] INFO PlaylistInputStream - cakgok listening to "Opeth - Damnation/01 - Windowpane.flac"
[2013-01-27 21:54:56,399] DEBUG TranscodeInputStream - Starting transcoder: [/var/subsonic/transcode/flac] [--decode] [--stdout] [/home/cakgok/whatcd/Opeth - Damnation/01 - Windowpane.flac]
[2013-01-27 21:54:56,401] DEBUG TranscodeInputStream - Starting transcoder: [/var/subsonic/transcode/lame] [-V0] [--vbr-new] [-] [-]
[2013-01-27 21:54:56,425] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/flac)
[2013-01-27 21:54:56,426] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/flac) flac 1.2.1, Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
[2013-01-27 21:54:56,427] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/flac) flac comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
[2013-01-27 21:54:56,427] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/flac) welcome to redistribute it under certain conditions. Type `flac' for details.
[2013-01-27 21:54:56,427] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/flac)
[2013-01-27 21:54:56,801] WARN StreamController - throwable caught!
org.mortbay.jetty.EofException
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:760)
at org.mortbay.jetty.AbstractGenerator$Output.blockForOutput(AbstractGenerator.java:546)
at org.mortbay.jetty.AbstractGenerator$Output.flush(AbstractGenerator.java:567)
at org.mortbay.jetty.HttpConnection$Output.flush(HttpConnection.java:907)
at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:628)
at org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:575)
at net.sourceforge.subsonic.controller.StreamController.handleRequest(StreamController.java:220)
at net.sourceforge.subsonic.controller.RESTController.stream(RESTController.java:841)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:471)
at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleRequestInternal(MultiActionController.java:408)
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:900)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
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$CachedChain.doFilter(ServletHandler.java:1093)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:311)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at net.sourceforge.subsonic.security.RESTRequestParameterProcessingFilter.doFilter(RESTRequestParameterProcessingFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
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$CachedChain.doFilter(ServletHandler.java:1084)
at net.sourceforge.subsonic.filter.BootstrapVerificationFilter.doFilter(BootstrapVerificationFilter.java:54)
at org.mortbay.jetty.servlet.ServletHandler$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.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:89)
at sun.nio.ch.IOUtil.write(IOUtil.java:46)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:450)
at org.mortbay.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:166)
at org.mortbay.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:208)
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:693)
... 61 more
[2013-01-27 21:54:56,840] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) LAME 3.99.3 32bits (
http://lame.sf.net)
[2013-01-27 21:54:56,841] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) CPU features: MMX (ASM used), SSE (ASM used), SSE2
[2013-01-27 21:54:56,841] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) polyphase lowpass filter disabled
[2013-01-27 21:54:56,841] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) Encoding <stdin> to <stdout>
[2013-01-27 21:54:56,841] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) Encoding as 44.1 kHz j-stereo MPEG-1 Layer III VBR(q=0)
[2013-01-27 21:54:56,842] DEBUG InputStreamReaderThread - (/var/subsonic/transcode/lame) Error writing mp3 output