Thank you for your post.
My first thought is that the file may already be damaged, so going to another version is not going to make the file better.
Although you don't mention it in your post, have you tried recovering the file? That is, close the file, and with FileMaker Pro still open, pull down the File menu and select "Recover...". Locate the file and click "Select". Save the new file to the Desktop. Open the recovered file and work with it.
Although the Recover option will do its best to fix the file, (and most of the time it does), we still recommend that you revert to a file that doesn't have this problem and import the data from the new file.
Yes, the crash log could be helpful, and I would like to see it. Check your Inbox at the top of this page for instructions where to send the file.
I have had this issue as well.
I got the gut feeling that it happens when FileMaker becomes terrible slow while quitting it. For example, when leaving a wifi network (I often work in a train), FileMaker takes then a very long time to quit (FileMaker was running when leaving that network, although the files were local on the HD of the MaBook). It happened 3 times on different machines, different FileMaker solutions. I never used the crashed file, went back to the last backup. I checked the files afterwards using FMDiff and 'Konsistenz pruefen' from the recover menu. The files were fine.
It happened always under 10.6 - but one or two times on older verions than 10.6.8
thank You very much and kind regards
(edit: Happened under earlier versions of FM 11 as well. I' working most of the time with ADV)
Unfortunately the Crash Log for this is long deleted. If it happens again I'll be sure to save it. All of the databases in question were externally hosted so no recovery should be needed in fact there's no way of telling which of them (if any) was a contributing factor. In no case however should anything that FileMaker does cause the system to go into a Kernel Panic regardless if the database is in some way corrupt.
I do seem to see a relationship between having externally hosted databases open and possibly databases from multiple FileMaker Servers. I frequently will have databases open from at least 2 FM servers, one that is local to my network and one or more that are remote. This could confirm Marcus observation that it happens when network access is slow.