CGB wallet broken?

[karlb]

So I've had some CGB for just over a month now.
Whenever I open the wallet I get this error:
Assertion failed!
File:src/kernel.cpp
line: 369
Expression:pindex->pprev || pindex->GetBlockHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)

I've tried reinstalling the wallet, downloading again from the site, but still doesn't work.
I'm worried I won't be able to access my coins again