I have submitted at least 4 crash reports when they have come up and resulted in the prompt to submit them. I do not have hard copies of them accessible currently. I know that two of them resulted in PPro being unable to save the current state of the project and at least the other two were "recoverable" after the prompt that an error was encountered and the project would be saved. A bug report has also been submitted.
This is extremely reminiscent of the AE CC2014 behavior that seemed to "build" to a GPU-related memory leak crash after scrubbing audio. With that memory leak the system started to feel sluggish, performance dwindled, then the software would either crash or lockup - sometimes with a crash prompt, other times completely unrecoverable. That's the same behavior that I'm experiencing with PPro CC 2014.2 currently.
At this time I have not switched the render to software only, though that will be the next step. A few effects/plugins are GPU accelerated and I really don't want to lose performance. I also have not rebuilt the project, exported XMLs and re-imported, or any of the other typical workaround solutions. I am just trying to get a project finished and meet a deadline - those methods more often than not require rebuilding a lot of the finishing parts of a project.