I already updated my KS20 german from v10b to v10e and now all GAPI/DirectDraw/PocketHAL applications are running on the device.
Though, sometimes they freeze, especially when device wakes up from standby and some other applications are running in background.
There are rumours that a v10f version will be available within next weeks. Maybe it fixes this behavior...
Here is the link to all you need for an update:
Unfortunately an english ROM update doesn't exist at the moment but many other languages are available.