Bah (this is not a complaint towards Jakob but a general xls transform rant)
I hate the xml/xsl transform where everyone seems to use the StreamSource method where you basically does a http request towards the database to read the xsl file.

I've seen this in my company's solutions as well, and its a disaster, it has to be a better way to do this.

It is even more devastating in this solution because you obviously don't want to allow anonymous read access into all these log files, especially on a server that's is reachable from the outside.

The solution: Tick in "available for Public access users" on the file resource transform.xsl

Then make sure Anonymous is "no access" but tick in "Read public documents"

/Danne