i came across this issue and i like to add another reason for this issue to be fixed
new handsets are coming out like the Nokia X3-02 and c3-01 which are Touch & Type i.e. they have a numpad keys and small res 240X320 touch screens.
those are usually at the lower end of the device performance spectrum and when touching a textfield on the screen to give it focus (which you must do since there is no joystick) it can take around 5-10 seconds for the VKB to be showed.
instead typing should be done with the numpad which is more intuitive for those handsets.