Lately I've been getting an annoying problem that seems to have no fix. After leaving an application running for awhile, say, a day or two, the little yellow minimize button quits working and eventually gets greyed out. This seems to happen on all applications if I leave 'em going long enough, and the only solution I've found is either to restart the application or, when that often doesn't work, restart the computer. This is a fairly fresh install of OSX.4.6, and I've done the standard repair permissions and such maintenance, but it didn't fix the issue. Anyone have any ideas what could be causing this?