It stops scrobbling after computer emerges from hibernation. Re-starting MediaMonkey cures the problem.
Happens consistently in MediaMonkey 4.0.1 (Scrobbler 1.0.2.29).

Nothing of the above works for me. I tried plug-in versions 1.0.2.29 and 1.0.2.26.
Worse, after trying the above suggestions, extension options are no longer remembered, and nothing is written to the last.fm log file.

There is still similar problem as of version 3.1, but it happens under slightly different circumstances. I get new music at home, put it on iPod (manual sync), then bring iPod to the office and copy tracks from iPod to the office PC. I tell MM to rip into C:\Music\Artist\Album, and it does so, but i...