Comment 17 for bug 388160

@Fabio Marconi: I finally succeeded in installing Lucid (had some technical problems doing so and not a lot of time to experiment). The bug is now present when freshly starting X, but disappears as soon as the user presses the middle mouse button. You could have known this by looking at the Xorg bug of which this one is a duplicate
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/54191
(see post #10; just to make this 100% clear for other people, I'll try to mark this bug as a duplicate).
I personally use the middle mouse button so frequently (for pasting) that after installing Lucid, I didn't even notice the bug was still there, but there may be other users who don't use their middle mouse button so much and still have problems.

@daniel: judging by what you wrote, your written English is probably better than a significant percentage of native English speakers (at least here in the USA). I would classify your fluency as "advanced" to "near-native". Don't reply to this to thank me; this is a site for reporting bugs and there's no place for off-topic stuff.