I have changed from Mint 13 to Ubuntu, complete fresh install. However I regularly get programs becoming unresponsive after switching between screens or work places.
Example before i was using firefox have 2 pop up screens(no junk ones) bank login and an ebay chat, switching between them and then firefox faded to grey and I had to force close as it become unresponsive.
Ubuntu is very nice to use, but I never had these problems using mint 13.
Is this common, are there any fixes coming??