UMA doesn't work too well in .593. "Preferred connection" is set to "WIFI preferred" but it's either just on EDGE (due to 3G not being available in my flat, that's normal) or jumping from UMA to EDGE and EDGE to UMA all the time. However, it's fine if I'm setting it to "WIFI only". >_<
Sometimes it's just jumping to UMA and doesn't jump back - but that's just random and can take quite some time...even when I reboot / do a batter pull.