those that actively and thoroughly read Release Notes before migration of their instances might be able to ignore this thread - all others should be highly aware.
In PPM 8.03, there are a LOT of changes to core functionalities. Du to that, since PPM 9.10 and 9.11 were released BEFORE that, problems might occur. It is therefore IMPORTANT if 8.03 is installed and 9.1 is a target, to install 9.10 and then IMMEDIATELY deploy SP 2 without running PPM in order to avoid ANY problems with the functionalities.
Here the quote from the latest Release Notes (I believe version is from August 2011):
On PPM 9.12 Release notes, page 18:
PPM Center versions 9.10 and 9.11 were released before versions 8.03 and 9.12. Versions 8.03 and 9.12 include improvements to core functionality that are compatible between those versions, but are not supported on the older versions 9.10 and 9.11. If PPM Center is running at version 8.03, do not upgrade to and then run at version 9.10 or 9.11. Instead, upgrade from version 8.03 to version 9.10 temporarily without running PPM Center, and then upgrade immediately to version 9.12.
Hope this helps to avoid the one or other problem and resulting ticket.