First of all, thank you for taking great care of WPMU. While it looked intimidating to me way back WPMU 1.2 with the “run, don’t walk, to” in the readme.txt, it continues to be a great adventure.

I experienced white screen in frontend and backend when I upgraded a development install way back to WPMU 2.9 beta 2 รขโ‚ฌโ€œ trunk-r2026 and ran script. Fortunately, I upgraded via FTP upload at that time and noticed wpmu-upgrade-site.php in wp-admin folder as I was uploading WPMU files and folders.

Running gave me back my frontend and backend. Check in database showed new commentmeta table for all blogs. I am using WPMU latest trunk version now and no hiccups so far ๐Ÿ™‚

Thank you again, Donncha.