I noticed it doesn't happen only for selection. The attached screenshot shows it occurring on the tab bar, which means it affects chrome too.
I use tabbrowser extensions to move the tabs on the bottom and select them on hover, so I'm not sure if this particular thing appears with normal FF. It happened when the tooltip appeared on the tab (by holding the mouse over). It was only visible when the tooltip disappeared. The edge of the error is exactly where the tooltip started. If I make another tooltip appear to its right, the error remains there (but only if I don't change the tab). If I make one appear to the left, the error is extended to the entire area covered by the tooltip. This also disappears if I try to make a screenshot. ** Attachment added: "error occurrence in tabs" http://librarian.launchpad.net/6609847/pixelerror.png -- selection moves some lines up by a pixel https://launchpad.net/bugs/89635 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
