For some reason a few menu's created with certain Java Applications in Windows Vista x64 get black line strikeouts for some reason. I would post a picture, but I don't have web space for one. The applications I know it to effect on my PC are the beta of Dreamweaver CS4 and Azureus Vuze. It does not effect Netbeans or OpenOffice.
I'm using the latest Official ATI Drivers on an X1900XT 512MB and WB 6.11 Build 100.