A few days ago I decided to install my Microsoft Office 2007 under linux. I wanted to avoid starting the Windows Virtual Machine. All was damn easy and worked like a charm BUT powerpoint. It is not like I do create lots of presentations in powerpoint (I doubt I do one a year) but I do receive a lot of presentations that show crappy on libreoffice.
After googling a while I found in the winehq forums a user who posted that adding to wineconfig the riched20.dll library did the trick. Indeed it did and I post it here hoping that you find it faster than me =)