I don't know if it is just me thinking this but it appears that my wallet on my Pi is downloading the blockchain much better (less getting stuck on blocks) when I have the original theme selected. It could just be a coincidence but it hasn't gotten stuck on a single block since I switched over to it two hours ago. The hyperblue theme seems like it would get stuck every 45 minutes to an hour.
This is likely coincidence. Early blocks get stuck a lot, part of the carryover from Truckcoin.
To my knowledge, the themes have absolutely nothing to do with the code that handles the actual mechanics of the coin, but if they ARE interfering, it would be good to know, and to kill the bug.