I’ve been getting a lot of comments that say “invalid BS_jmpBoot in boot block: 000000” happens with Apple’s Boot Camp HFS drivers from Snow Leopard as well as MacDrive. The act of assigning a drive letter to the partition seems to cause the GPT corruption. This would seem to make it a Windows issue. I do not speak for my employer in any official capacity, but when my current high-priority tasks are done, I’ll ask around at work and see if anybody knows anything about this issue.
Meanwhile, keep sending in your experience reports! The more data, the better.
update: Comments have been turned off for this post; all questions, comments, suggestions, and support requests about gpt-surgeon must be submitted through the gpt-surgeon LaunchPad site and should be accompanied with disktype reports.