I also get the occasional Delfina Lite lockups/crashes, but I always took them to be due to the insanely buggy delfina.library rather than the hardware. From what I understand, the patched version of the library doesn't fix the bugs, it just suppresses them (I.E., things are still going bad behind the scenes).
The newer versions of the library made for the Flipper board don't work with the Lite board, at least for me. I would pay money for a compatible and bugfixed version - anyone want to take a crack at it? It's GPLed now...
