I have same problem! Can't really find a solution. It happens with many themes, most bplay.com themes and hedonedesign ones. While elicite ones work absolutely normally. Maybe it somehow depends on the platform specific theme is built. And noone can really help
I tried wiping my blackberry completely and fresh installing all the apps one by one, but nothing. It just goes blank on some themes and doesn't on other. It all started with 5.0 on my phone.
Wall-e and Metallic from hedonedesign are my favourite theme, but they both malfunction and I can't use them.
Is there a cure?