What do I do with disturbing bug reports in Wine about system crashes?

[Scott Ritchie]

Fairly often, I'll get a bug report filed against Wine about something
that Wine shouldn't be able to cause - total keyboard deadlocks, frozen
screen, being unable to even ctrl-alt-backspace or ctrl-alt-f1, etc.

These are clearly not Wine bugs, but it's unclear to me where I should
refile them.  Wine's exposing a bug somewhere else (probably the driver
or X), but what should I do?

Thanks,
Scott Ritchie