I have had problems with my phone coming back from sleep with all the recent kernels. With the 4/2 kernel, the phone just seems to lag too much on the unlock screen for me to unlock it.
The last one I had that was okay was the 3/11 kernel. This is running with both FRX05 and 6.
edit: after reverting back to 3/11 I did notice that the light was green as the phone slept, and with the newer kernels the light was orange.