I wanted to let you all know some more info we have found in regards to 64 bit servers in your farm. The original post was here
Meron Friedman commented that the Lotus Notes Protocol Handler isn't included with the 64bit version (thanks, Meron). I can only assume that other protocol handlers, like the Vorsite Documentum PH, won't work either.
And in case you didn't know, the Lotus PH is installed with the 32bit version of MOSS in c:\program files\Microsoft Office Servers\12.0\bin\NotesSetup.exe
In Microsoft's defense, they don't control 3rd party protocol handlers and iFilters (like Adobe).
Here is a great thread on how to get a 32bit version of the Adobe iFilter to run on a 64bit OS. It is UNSUPPORTED, however...so I don't recommend it. It is good reading, however.
Ben Curry
Mindsharp