I have a bug to report on the renderer that exists in Creo 2.0 M050 and persists in M060. It's 100% repeatable and only requires a drawing of sufficient complexity (tested on multiple) to cause a crash-to-desktop (all work lost) condition (which as a programmer, is the worst you can do aside from "corrupts computer"). I can get the crash to happen on all four of our systems (a mix of Dell Precision workstations and Optiplex machines) of which one is on the "certified hardware" list.
The crash is easy to reprodice. Load a drawing of a moderately complex assembly with views in "No hidden line" mode... something that takes a few seconds for the HLR process to run. Next, switch to layers. Then hide a layer such as surfaces. The program should now begin the process of hiding the layer which should take a few seconds. During this time, there is no indication it is working. No "wait" mouse-pointer, no "processing" stop-sign, nothing. If you do nothing while it is processing, it will eventually succeed and you can continue working. If though, while it's processing, you try to click on any layers, or switch back to model tree view, or do anything else while it is in this "processing" stage (it won't let you, the interface is locked), the program will suddenly crash to desktop when it finishes processing the hide request.