For several years I've used either Cygwin/X or more recently Xming as an X server for GUI access to Fedora machines from Windows machines, sometimes with XDMCP but mostly with SSH tunnelling using Putty/Plink.
Recently I tried the same to an F7t2 machine, and again today with a rawhide machine that must be pretty close to what is going to be F7t3, Initiating the session with plink.exe and starting gnome-session on the Fedora box tunnelled back to windows, the Gnome session starts up OK, the gnome-panel reacts properly to mouse moves/clicks for a few seconds and then starts running like treacle, only accepting one click every 60 seconds or so, I've checked the same to an FC6 machine and it doesn't occur, I've upgraded to the latest Xming version and it doesn't help.
I *think* the version of Xorg in F7/rawhide now uses XCB underneath Xlib as the transport, I don't claim to know all of Xorg's internal plumbing, but could this be related, or be causing some weird SSH/Xorg interaction?
If I start Xming as a listening X server on the Windows box, then start a command line Putty/ssh connection to the F7 machine, and initiate a Gnome session back to the Windows box, with
export DISPLAY=aaa.bbb.ccc.ddd:0.0 gnome-session &
it seems to run for longer, before meeting the same fate
I realise this problem involves Xming (and windows) as well as Fedora, but it seems to be F7 related, because FC6 and FC3(!) machines still work OK, any other users doing remote X sessions and having problems?