As I'm not allowed to add something to above mentioned thread: I'd like you guys to add a reference to the release notes / What's new to this thread also.
By the way: What changed in SAPGUI 7.4 SP3? Where are these release notes (not bug fixes, but changed/added functionality)
I read somewhere that the new Landscape-Format (new saplogon.ini) is now mandatory. Is that true? Because that would require more testing and changes to our sapgui-landscape before one can apply the patch to our SAPGUI-Server.