http://bugs.winehq.org/show_bug.cgi?id=22725
--- Comment #10 from Alexandre Julliard julliard@winehq.org 2010-06-11 05:54:46 --- It's accessing memory at 0x20000, which used to be mapped as DOS memory, but isn't anymore. This is quite possibly an Excel bug, on Windows the user parameters are usually mapped at 0x20000 so the invalid access wouldn't crash.