Forum OpenACS Q&A: Re: Long-running AOLServer is forgetful?
I'm not sure if this is related or not, but sometimes I have to empty my browser cache and then kill and restart the browser. It may have to do with the mtime on the file plus the cache's behavior. I essentially had the same problem: an error kept appearing.
So question: did the log also report the error?
Also debugging a request should be easier than it is. I started using index.vuh files, and it seems that once the rp hits that file, it stops logging. It actually reports the wrong file (it is the adp template it thinks it is going to use, but if the tcl file uses ad_return_template with something else, the rp has no clue).