When opening a category in the left-hand navigation bar (Webmin 1.480) using Firefox 3.5.2, the text for all the module names overlap each other, and it is impossible to select one.
Are you using adblock or noscript with Firefox there? Some users have reported exactly this kind of menu corruption when they are enabled ..
This can be closed - I narrowed it down to the Java Console - it seems the latest Java update temporarily caused a problem.
That's odd .. I wouldn't have expected Java to cause a problem like this.