Thanks for posting!
I did a few tests and was able to reproduce the behavior you're seeing. I wasn't able to get the same behavior using FileMaker Pro 10 on Windows or FileMaker Pro 11 on OS X so it appears to be specific to Windows and FileMaker Pro 11. I've forwarded your post along with my findings to our Development and Quality Assurance (testing) departments for further investigation.
Thanks for your prompt response and diligent testing. Your are correct I'm using FileMaker Pro 11 on windows. If your QA group finds an answer to the problem let me know.
Did you find allready a resolution?
I have the same Problem with Windows and FileMaker Pro 11