Here is a fix for bug #1492603 (Where plugins are searched for on *nix).
As an aside, I see no way to attach a file (e.g., a patch) directly to the bug, and no way to link this patch to the bug in the SourceForge tracker. Have I overlooked something?
trunk version
branches/v2_0branch version
Logged In: YES
user_id=1914147
Originator: YES
File Added: plugindir_v20.patch
Logged In: YES
user_id=1417147
Originator: NO
Applied to SVN trunk at r16886 and v2_0branch at r16887.
Thanks!