http://bugs.winehq.org/show_bug.cgi?id=11773
--- Comment #11 from Diego Jacobi jacobidiego@gmail.com 2010-01-04 14:07:54 --- Sorry.
I wont be able to test it again up to in 2 or 3 months, when i go back to my land and have my computer again.
Anyway, Mathematica 5.1 is today an "old" version. Latest version is mathematica 7 and things like the helpbrowser changed.
But i dont think that this error would be fixed in newer versions.