Phil Mills - 2007-09-25

  WinXP SP2
  Pidgin 2.1.1 (run from a flash drive as Pidgin Portable)
  Extended Prefs 0.7

... the "Show buddy list in taskbar" option is intermittently ignored if it is unchecked.  That is, occasionally the buddy list will show in the taskbar regardless of the pref. setting. 
Checking and then clearing the option will remove the taskbar entry again.

I have not found a pattern to the behavior.  It's no show-stopper but may bear looking into at some point.

The only other enabled plugins on my installation are both from the default pack:
  Log Reader 2.1.1
  Windows Pidgin Options 2.1.1