Google has just released Sketchup 8 M3, their latest batch of bug fixes. The fixes are as follows:

We’ve fixed some more crashes folks reported in Ruby Observers.
Those of you with many Ruby extensions installed should no longer suffer from greyed-out menu items.
SketchUp Pro network licenses on Windows now allow multiple instances to run on the same machine at one time.
...and the usual collection of performance improvements, security updates and bug fixes.

While it's nothing earth shattering, it's nice to see that even in the wake of an acquisition, they are still constantly improving Sketchup. If you are eligible for the update, you will get notified the next time you open Sketchup.