"bookmarks.html" file copied again and again (and again)

I'm using Seamonkey 1.0 on a Mac (MacOS 10.4.5) and for some strange 
reason my bookmark file (bookmarks.html) file seems to be copied all the 
time, so now I have (in addition to the original file):

bookmarks-1.html
bookmarks-2.html
bookmarks-3.html
bookmarks-4.html
bookmarks-5.html
bookmarks-6.html

.... and so on.

I first posted about this in the "mozilla.support.seamonkey" newsgroup 
where I was referred to the following website: 
http://ilias.ca/mozilla/troubleshooting/#ManyBookmarkFiles

The solution on that page was to delete a file named 
"bookmarks.html.moztmp", but I haven't found any file by that name, and 
copies are still being made of my bookmark-file.
Perhaps there's a different solution on the Mac platform.