I found two graphical artifacts in VirGO GUI. In Stellarium these artifacts not observed.
Screenshot was created on Mac OS X 10.6.4 with VirGO 1.4.5
Artifacts with download progress bar reproduced on Stellarium 0.10.5 - see bug #671633
Thanks a lot for taking the time to look at this. I have just applied your patch
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Screenshot was created on Mac OS X 10.6.4 with VirGO 1.4.5