http://bugs.winehq.org/show_bug.cgi?id=28531
--- Comment #6 from Henrik Pauli henrik.pauli@gmail.com 2011-10-05 19:24:09 CDT --- Ha!, with a little bit of messing around I found what triggers it. Apparently it has trouble capturing the mouse cursor when not focused, so if you turn that feature off (highlight is okay), the stream will survive just fine.