That is odd. No I'm out of ideas. The only other option I could think of would be to make a note of all your LW settings & then delete the LW prefs whilst LW is fully closed. Make a note of the settings b/c once you delete the prefs folder then you'll need to reset the options next time you open LW.

For OSX prefs are found here: /Users/your_username/Library/Preferences/LimeWire

Please post back & tell us if this improves things or makes no difference. (I wonder if there's a clash of active files on your system.)