I am running Vista Ultimate and Business versions. I tried this on both with same results. It may affect other Office 2007 apps, I haven't gone through every dialog to see.
The problem - If I use any skin, even made for Vista skin, the Rules and Alerts dialog is not usable. It is just a gray box that will only show the header of a single column when I mouse over. I have to completely exclude Outlook 2007 or unload WB 5.5 for it to be visible. If I exclude, of course, Outlook looks terrible because it is using whatever color scheme the skin has set with no effects. I am having a similar issue with Nero 7 and the pop-up menu list in Showtime (yes, I know, horrible app, but it is the only way I can play a DVD in the business version without spending more money). I assume it is related.
Any thoughts or suggestions? Known bug? TIA