virt-manager-0.8.0-7.fc12 fixes the following issues:

• Pull in late submitted translations (one of which the translator says fixes serious errors) (bz 493795)
• Don't allow creating a volume without a name (bz 526111)
• Don't allow volume allocation > capacity (bz 526077)
• Add tooltips for toolbar buttons (bz 524083)

The latter three issues are low risk nice-to-haves. I verified the fixes work, and don't affect the larger functionality of the app.