For those who may be interested, I've put up a couple of long posts in the Radio Userland category.
The first one is a debugging of the radio.macros.weblogEditBox macro to show (primarily Radio Userland's programmers) why Radio's WYSIWYG editor toolbar buttons disappear when IE6 is in "standards-compliant" mode. (Bottom line: bad CSS.)
My second post addresses this Radio error:
Radio UserLand's nightly backup failed because there was an error verifying the backup:
Verification of backup failed because the weblog backup for 4/2003 does not exist.
If you use Radio and have been receiving this error, you'll want to read my post to see why this error occurs and how to correct it.