Last.FM Scrobbler error...help required please

[Iggster]

Since the 30th Sept my Subsonic install has stopped scrobbling.....well to be more accurate, it still tries but generates the following error:

[10/21/09 10:43:04 PM BST] WARN AudioScrobblerService Last.fm scrobbler queue is full. Ignoring E:\iTunes Music Lib\Hed Kandi\Nu Cool 02\14 Retro.mp3

I know Last.FM made some changes to their site and scrobbling service around that date and I'm wondering if there is an update I need or a quick fix to get my tracks scobbled again?

Many thanks in advance for any help offered!