http://bugs.winehq.org/show_bug.cgi?id=30511
--- Comment #5 from voidcastr cephryx@gmx.net 2012-07-02 03:59:50 CDT --- I just noticed that the crash frequency seems to correlate neither with the download volume nor with the time elapsed: Just had a crash after 14min/572MB.
Also, from your log it appears that you are using a 32bit wine environment - I hereby confirm that this happens for 64bit, too.