I too noticed this a few times last night. I thought I was going to exit and log back in. I don't know if it was pure coincidence, but on the button I would normally left-click on, I right-clicked and that seemed to correct the issue. Was really weird.
I'm having an issue where everything on my screen, in-game of course, is not clickable with my left and right mouse button. Keyboard buttons work fine, only mouse doesn't.
This happens randomly. It usually goes away after a minute or two, and sometimes it lasts a bit longer. Even if I alt-tab, and/or, alt-z to clear screen, it still doesn't fix it. I don't know what triggers this and I don't know how to clear it, all I know is it happened in beta around 2-3 months ago, and is still happening now. Again, this happens randomly and only this game.
If anyone has suggestions of any sort to fix this, would be greatly appreciative.
Btw, Republic Forces is now recruiting, so please go to republicforces.net and register. We're on the Mask Of Nihilus server. Thanks!