From the moment I upgraded to WPMU 1.2.1, my error_log started filling up with these couplets:
[Tue Apr 17 23:28:34 2007] [error] [client xx.xx.xx.xx] mod_rewrite: maximum number of internal redirects reached. Assuming configuration error. Use 'RewriteOptions MaxRedirects' to increase the limit if neccessary., referer: http://jobmob.co.il/
[Tue Apr 17 23:28:34 2007] [error] [client xx.xx.xx.xx] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace., referer: http://jobmob.co.il/
AFAGK, 'LogLevel debug' can only be used via httpd.conf which I do not have access to, but what does Google know :)
Interestingly enough - these errors are not generating any 500 errors in the Apache log.
On upgrade, I removed the 'www redirect' from my .htaccess file, just like it disappeared from htaccess.dist.
I could try changing the MaxRedirects value but that's the easy way out.
Any suggestions? Anyone else see this with 1.2.1?