Ok, well I posted this yesterday but the forums crashed or somthing and it got deleted. I am pretty sure this will make Windows Aero work and fix other problems
 
Go to Desktop or Wherever LimeWire.exe is 
Right Click on Icon 
Go to Compatibility Tab 
Go down to the box where it says Run this program as an administrator 
Check the box 
Click Ok 
Star LimeWire up and when Security box pops up click Allow 
LimeWire should start up with Aero and other problems may be fixed
 
   
I think this should work if you havnt tried it yet. Just post here for other Vista questions cause I can help a lil since I have been running Vista since RC1.