Thank you for your feedback.
Unfortunately, we have tested your DWG file with AutoCAD2009, but couldn't reproduce this issue.
As this discussion board focuses on DWF questions and I believe that this situation may have more to do with some relationship to your specific configuration or environment and the ACAD installation, I recommend that you post this question to the dedicated AutoCAD discussion board found by following this
link.
Please let me know if you have any further questions.