I'm having a weird problem in Leopard, and I have no idea if it's isolated to my system (can't find other references online).
It's kind of hard to explain, but here goes: sometimes, when I click on items in Mail.app (mailboxes, messages), or feeds in Vienna or in NetNewsWire -- so in a sidebar --, the interface appears to get one click behind. So, I'll click on a message, but the UI doesn't update until I click on something (although the result of that click doesn't show up until the following one). Or, I'll click on something and press the space bar, and the keyboard stops doing anything in that app, until I click somewhere. Or, I'll click on something, then click on the title bar of the app, and then I see that the app believes that I was dragging whatever I had clicked -- that is, as if the mouse button were being held down. Clicking in the menubar clears all of them up, until the next time. And it happens a lot. It seems like a single-click is being interpreted as a click-and-hold, maybe, but I can't be sure.
So, a bunch of weird problems, all of which are related to clicking. I've tried disabling all of the different 'suspicious' software I use (QuickSilver, FinderPop, etc.), without any change. This is all on a MBP 2.4, OSX.5.1 from an Archive + Install from Tiger. The problem was never there in Tiger.
Thanks for a confirmation, a workaround or any further info.
Jeremy