[ubuntu] Odd mouse behavior

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http://ubuntuforums.org – Hi everyone, Since the update to 12.04 I have had a couple seemingly related issues with my mouse. 1) When browsing a folder, it takes several times passing my mouse over a file before the file will 'light up' to indicate I'm pointing at it. Sometimes I can't get it to light up at all; sometimes I can get it to light up by pointing somewhere else. Unless it's lit up, clicking does not select it, and right-clicking brings up a context menu about the whole folder, not the individual file. I can still select files by dragging a selection box around them. Dragging files around has become imp (Hardware)