ASToperator error

I recently installed a developer version of CF9 along with the 9.0.1 update.  I noticed several things that didn't quite work right.  For instance in the CF administrator area I went to look at the log files and it bombed.  On the public side I loaded up a site for a recent gig I'm working on and got the following error:

Unable to find an operator implementation for coldfusion.compiler.ASToperator

I didn't find too much in the blog world on this error.  I did find some things on the error message that I got when trying to look at the log files.  There was a bug recorded on the Adobe site.  The work around was to reinstall CF and reapply the update.  After proceeding with that, which only took a few minutes, all was right with the world again.  All errors disappeared.

Moral of the story?  Maybe the update didn't install properly.  I do remember getting an error message saying that the update didn't complete and that next time I should remember to shut down the CF services before applying the update.  That could have been it.  Either way... it works now.