Quark 7 Downsave to Quark 6.5

Apparently, you HAVE to upgrade to 6.52 in order to read the files that Q7 saves down in "Quark 6" format.

I found it on a Quark forum, but not even the release notes say anything about it. I've verified it with the simplest of files - 6.0-6.5 crashes it. After the 6.52 upgrade it does not...

Mike