[THIN] R04 - Breaks Window Minimize?

We have applied R04 to ZenApp 4.5, W2k3 SP2, tested and it worked beautifully on a full speed network.
We tried on a 3G network, and connected ok (didnt really go any further than that)
 
Its been rolled out to our servers, but some are now experiencing session 'hang ups' (client is running '52110' > 10.1 client, xp, wth 1024X768 screen)
 
1. If they load a full desktop, exit full desktop (shift +F2) and try and "shrink" the session we get
"Not enough memory to perform scaling. Quit Some of your active applications, and try again" Even though they have just logged in.
 
Upping the farms memory display limits has had no effect. Dropping the bit rate of the session (from 32 bit) fixed some clients but not others.
 
2. If any session is minimised, we get (including the full desktop as described above) the client window outline maximises, but the contents doesnt refresh (sometimes at all) usually until a window or something else is clicked or 'changed' within the session
 
It only seems to occur on clients with a slow network connection (ie 3g or external clients) as the local LAN - doesnt seem to have th problem at all.
 
The xenapp plug 11 in seems to resolve the issue, but thats not really a quick solution for us at this stage.
 
Any list legends out there have any ideas where to look next?
 
Cheers
JAMES

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