I run into an issue with the Self Host relating to #501
However, it would be useful if exceptions in the background thread could be handled by a supplied exception handler rather than being thrown up in the App Domain.
Would using the ErrorPipeline be sufficient for your needs?
Er - :$
That's a bit over my head but I think you're suggesting that errors would be caught and the request redirected to an error page? If so - that'll work when requesting pages but what about when requesting resources (files/images/etc)?
Fixed in 0.15 (or earlier)