If you were mining on a pool and received many small transactions then you may find that you need to consolidate them before you are able to send a large transaction. It's an issue with all cryptonote coins have but I think there has been some progress with that issue in other cryptonote coins like Monero and AEON.
The only difference I know about in the case of pool mining is the automatic splitting in Monero and AEON, but you can always do that yourself by sending a series of smaller transactions (exactly the same as what splitting does). If you are solo mining Boolberry will behave slightly better because it doesn't have the lowest-value dust output in mining transactions.
And I've never seen any crashing issues with the Boolberry wallet, though I only use simplewallet, not the GUI.