I am having this problem too. Tried with both a Logitech wireless mouse and a Microsoft PS/2 style mouse. Happens when I start using Firefox. I noticed that sometimes I can right click on the time, press ESC, and then I can start using my mouse left click again in FF. Sometimes that won't work or doesn't last long. I then have to quit FF using keyboard, right click on time again, and then I can get the left click back (at which point I just shutdown the system and wonder if I should roll back to 9.04 for now).
I am having this problem too. Tried with both a Logitech wireless mouse and a Microsoft PS/2 style mouse. Happens when I start using Firefox. I noticed that sometimes I can right click on the time, press ESC, and then I can start using my mouse left click again in FF. Sometimes that won't work or doesn't last long. I then have to quit FF using keyboard, right click on time again, and then I can get the left click back (at which point I just shutdown the system and wonder if I should roll back to 9.04 for now).