hikmat,
I also get that bug all the time, I have had to delete posts and then add in posted deleted due to duplicate posting. If I get the error, I DO NOT click post again, I close my browser, open it back up, log in and check my blog posts to see if it is there. If the post is there and it is live then no worries. If not then I click on post and try again. :-)
For now, it is the best solution, but I hope developers will solve the issue asap :/
I have seen others posting about it, so I am sure they are working on it. It is an issue though I think many run into. Lets hope it is fixed soon as you said! :-)