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user_id=6405

You mention that you're using a pre-release. There was a 
display bug fixed in the pre-releases. Please try the 
0.3.0 final. One of my workmates used 4.76 on RH7.1 until 
very recently, and the pre-release fixes fixed his problem.

Please try clearing the css in your instance home's html 
directory and see if that fixes the problem...