Matthew Haughton:Thank you for the post.This was previously reported (not through the Forums) and as you indicate is specific to the Windows platform.Additionally, I added your comments to the previous report made to Testing and Development.TSFalconFileMaker, Inc.
This has also been previously reported here in the forum.
For More Information see: http://filemaker.custhelp.com/cgi-bin/filemaker.cfg/php/enduser/std_adp.php?p_faqid=548
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip