I have a WebPart in MOSS 2007 that sets a variable in Session. Later, when loading a Webpart that loads a UserControl, the Session is NULL (not just the variable)
The Webpart that loads the UserControl have access to Session properly.
The Webpart "lives" within a ClassLibrary DLL, the UserControl are part of a WebApplication.
It seems that the UserControl and MOSS & Webparts are not sharing the same Session.
It doesn't make sense for me... for you?