http://bugs.winehq.org/show_bug.cgi?id=9942
Jeremy White jwhite@codeweavers.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |jwhite@codeweavers.com Summary|Powerpoint Viewer 2007 |Powerpoint Viewer 2007 |crashes opening .pptx files |crashes opening | |Keynote.pptx
--- Comment #16 from Jeremy White jwhite@codeweavers.com 2009-10-16 00:08:15 --- As of Wine 1.1.31, the Powerpoint viewer largely installs and works; you can view simple .ppt files as well as simple .pptx files.
You cannot view the described Keynote.pptx, most likely due to missing functions in riched20.dll (CreateTextBoxLayout for starters).
Getting a native riched20 enables the viewing of Keynote.pptx.
Bug 14980 is related and of interest.