http://bugs.winehq.org/show_bug.cgi?id=30849
--- Comment #106 from Erich Hoover erich.e.hoover@gmail.com --- (In reply to Erich Hoover from comment #105)
... In my limited testing it looks like things break down over 0xf0000000. I'll have to take a look into why (don't have time at the moment), but that could explain the issue.
Sorry, that should be _at_ 0xf0000000 (0xefffffff or less doesn't create "odd" behavior in a diagnostic I'm running).