I found if the quarantine has a plenty of files, it goes blank sometimes.
Normal Quarantine:
http://i1071.photobucket.com/albums/u511/aguyouren/Webroot_NormalQuarantine.jpg
Blank Quarantine(No grid lines, total blank):
http://i1071.photobucket.com/albums/u511/aguyouren/Webroot_BlankQuarantine.jpg
Environment:
Windows 7 Pro SP1 x64
8G RAM
Plextor M3P - 128G
Webroot SecureAnyware Essential - 8.0.1.299
Best answer by JimM
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