Have you tried to send smaller transactions? If you have had a bunch of small incoming transactions then you will have to send out the coins in smaller batches.
I tried sending 1-2 coins with the same fault, weird isint it?
I love this currency, but boy the wallet is really holding the price back bigtime.
It is a totally new technology.
Bitcoin was a piece of shit at the beginning. Worst wallet that XMR now.
I think people are too impatient. This is not an altcoin, it's a paradigm shift.
Devs are doing a pretty good work, there some bugs but it works. If you want to speed up things you can participate in improving the code or make a donation to devs to say "hey, I appreciate what you are doing, please continue".