Hi Ralf:

I can reproduce it on one of my trackers using the watcher (nosy) field.
Which is a multilink to user. However I don't seem to get crash email.

But I can't on the other. Both use SQLite so:

> I've currently only set up a test framework with postgres backend, I'll
> try to test this with another backend, too...

It does look like there is an issue with at least one other RDBMS backend.

I can't explain why my I can't reproduce it by typing "fred" into the nosy(watcher)
field on my active development tracker. It is in sync with the current mercurial
tip 43899d99.

Thanks for tracking this down.