Notes/Domino 6 and 7 Forum : Fixup on my mail database instantly crashed Domino

I had been using the OpenNTF template on my mail database, but replaced the design back to the stock R6 mail template and then began getting "Illegal Circular Use OpenNTF<something_illegible>" whenever I tried to open any of my folders. Another forum post I found suggested running compact, fixup and updall on databases exhibiting these "Illegal Circular Use" errors. I ran compact and it didn't seem to change anything, and than ran fixup and it instantly crashed Domino. I could not get any respone at all out of the server, or using the "server -c 'some command'" commands. Every domino backend process was completely unresponsive, so cringingly I had to "kill -9" them. Thankfully everything came back to life just fine at startup, with many consistency checks getting run.

Here's the snippet from my console log.

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Load Fixup "mail\neal_howard.nsf" >/notes/notesdata/rem93207.con
> 03/13/2003 10:25:08 Remote console command issued by DOMINO ADMIN/CWF: Load
Fixup "mail\neal_howard.nsf"
03/13/2003 10:25:08 Closed session for DOMINO ADMIN/CWF Databases accessed:
0 Documents read: 0 Documents written: 0
03/13/2003 10:25:12 Database Fixup: Started
Stack base = 0x2ff219d0, Stack size = 9880 bytes
Fatal Error signal = 0x00000004 PID/TID/K-TID = 22148/1/112921

Domino Halted. Type 'quit' to Terminate/Cleanup
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Of course I could not type 'quit' anywhere since the server would not read from the command line anymore. Duh.

After everything was restarted and all the consistency checks completed, I replaced my database design back to the OpenNTF template and everything seems back to normal, but is OpenNTF a "Hotel California" thing, one you check in, you can never leave?