Actually no, but so far all of my attempts to send monero using your GUI have failed. If I leave the payment ID blank it gives me the error message that the Payment ID is in the wrong format. If I fill it in, then it tells me the payment address is invalid.
I'm sorry to hear you are having problems with my wallet. I have test the sending and receiving of coins with my wallet with and without payment id. They both still seem to work ok. Could it be there is a space somewhere in your destination address or in the payment id textbox?
EDIT: Look what I have for today! 
Looking good!
I see you also have a 'spend/received' column. I just noticed in my own wallet this might be wrong. I had test wallets where the amount of spend and received combined dit not add up to the actual balance. When executing the 'incoming_transfers' command at the command line, with the 'available' or 'unavailable' argument you'll see you get the transactions of type 'F' or 'T' respectivly. I don't think the types correspond to received and spend. I changed the type column to 'Availablity'.
Maybe someone else knows the relation between availablity, the 'T' and 'F' type transactions and spending and receiving coins?
A minor update of my wallet:
- Wallet update status is shown in status bar (just like updating the blockchain, updating the wallet can take some time)
- Transaction grid now adds new transaction instead of clearing the whole grid every time it refreshes
- Changed spend/received to unavailable/available