Thanks for posting!
I currently have Adobe Reader X installed and am unable to reproduce this behavior with FileMaker Pro 10v3 on Windows XP. I opened a new file and opened and closed the Manage Scripts window 10-15 times without a crash. I also had Internet Explorer 8, Adobe Reader and Microsoft Outlook 2003 open at the same time. What version of IE and Outlook are you using? Is this reproducible on a different computer? Does this still occur if you uninstall Adobe Reader X?
All of these operations, Manage Scripts, Launching FileMaker when another App is open require FileMaker to open a window. I've seen an reported a situation here with FileMaker 10 where FileMaker seems to corrupt Windows XP's ability to correctly open windows. (The window could be a dialog box in fileMaker or a window from another application.) Sometimes the window just won't open. Sometimes FileMaker quits unexpectedly, and sometimes a dialog box opens, but does not display all the contents correctly.
In my case, I was able to correct the issue by uninstalling FileMaker and then reinstalling--then running the updater to get it updated to 10v3.
Don't know for sure if that's what you are dealing with here, but you might try re-installing to see if that fixes the problem.
I haven't encountered this issue since upgrading to FileMaker 11.
Thanks for such a quick reply. I removed the reader10x prior to reading your response and that seems to have brought me back to normal ops. I'll keep the idea of reinstalling 10 w/ upgrades if the problems reoccur. In the meantime, gives me a good argument to upgrade to FM11, hey, gotta stay current, right? Best regards, John