Big bug alert!
The PerlBOINC scheduler is producing a very nice output of an error in formatting with the redirect.
Presumably, Rytis, this is due a text/xml MIME type of the output when it outputs HTML.
I shall look into this through the Sourceforge downloads and see if this is the case. I would strongly suggest a text/plain reply.
For the moment, the BOINC Project Status for PrimeGrid is broken thanks to this bug.