Ok, I tried to withdraw again today after my btc got stuck and were returned to my gox account. Now it's telling me "invalid bitcoin address". I tried a few different addresses including the one I used for the first withdrawal. Anyone else getting this message?
When you copy/paste, it'll say that if there's a space at the end of the address. It's always what causes that message for me anyway.
Hmm, could be the cause. But I did not change the copy source since the first attempt to withdraw, which "worked" till the coins got stuck. I suspect they've got an empty hot wallet, as explained in some of the answers here:
http://www.reddit.com/r/Bitcoin/comments/1x3unb/new_trick_of_mtgox_pretending_that_the_withdrawal/.
Yes. It seems that having thousands of failing transactions is just too embarrassing, so better to artificially prevent btc withdrawals by creating yet another "glitch/customer issue"
I looked at a number of the failed transactions on skanner before the api facility was stopped and it seems a lot of withdrawal transactions had several inputs, but one of which had zero balance, an initial double-spend. For example. If customers A and B both try to withdraw BTC within a few seconds of each other their payments would share one input address in common with a balance to satisfy only one customer. Whichever gets propagated through the network first has a successful withdrawal, the other is silently ignored, languishing.