http://bugs.winehq.org/show_bug.cgi?id=58737
--- Comment #2 from Felix Hädicke felixhaedicke@web.de --- Looks like the end of stream detection does not work reliably.
See function end_of_read_data() in request.c, which compares the DWORD values request->content_length and request->content_read. Both variable values are incorrect: content_length is 4294967295 (DWORD max value) in this case. content_read is a lower value because the variable has overflowed several times.