It appears not necessarily be Apples fault, I did a build from todays CVS with a few of the routines changed as per the Apple tech note at:
TN2042
After a few changes the Popup menus work more Mac like on using the control key as well as poping up on pressing the mouse. The build
(which also sports a proper icon) can be downloaded at:
LimeWire Pro 2.4.3jum10