Apologies I don’t have anything useful to contribute, but just wanted to reconfirm that I also have experienced all of the issues mentioned in this post since moving to 3.4:
– Crash upon deletion of ROMs via Metadata menu
– Random blank screen upon “ROM launch config screen”
– Much slower boot time. I reckon it is at least twice as long to boot now, with same number of ROMs, in comparison to 3.3.