Eclipse tooltip preference bar on focus

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http://askubuntu.com – When I hover over a suggestion line in Eclipse to view the suggestion tooltip box, and then focus on the tooltip box, a bar gets added to the bottom of the tooltip obscuring some of the text. It's easily fixable by resizing the tooltip box, but it's annoying and ruins my workflow. Any suggestions to get around this? Sorry if I haven't put this very eloquently, it's hard to explain. Below is a couple of screenshots to give you an idea of what I mean. Before I've moved my mouse into the tooltip After I've moved my mouse into the tooltip (I can't post images because I'm too new.) I'm on Ubun (HowTos)