WB is still very unstable. My PC is a total workhouse, with nary a BSOD or hardlock in all of its days. Minutes after installing WB, as I wanted to try both a Tiger and Vista theme (both very pretty), I get into a HARD Lock.
I reset, I think it's just a fluke.
Nope, it does it again. WB to this day remains one of the worst things to put on your computer. Back in the days of version 1.0-3.0, it was bad. People said they "fixed" it in the current version. Sorry, but they were horribly wrong. Native theming (i.e. msstyles) is still the best way to go.