wine users - Jun 2011 - [Assassin's Creed]Transparant ground in Kingdoms

Hi,

There is a problem with this game since many versions of wine.
The game runs completly without problem but there is a graphical bug when the
character is in the Kingdoms.

In the 4 city : Damas, Jerusalem, Acre and Masyaf, there isn't this problem,
the ground is visible correctly.

This is the log (output console) :
http://bugs.winehq.org/attachment.cgi?id=35141

This is a screen with the graphic bug :
http://bugs.winehq.org/attachment.cgi?id=35142

Thanks for your help

Please, when posting links to attachments from bugzilla,
also post a link to the bug they're attached to.

I understand James but in fact, I wanted to know if someone had an idea where
come from the problem.

For FEAR 1/2 bug, it's a regression but for Assassin's Creed, the bug
exist since the version 1.1.X of wine so i don't think that it's a
regression. (And i don't error message in the console so i don't know
how to find the cause)