A new post by Valve's developer Jeff Hill in Reddit shows the updates on the numerous bug fixes. The problems themselves were found and reported by reddit users via newly created github bug tracker.
The github page has 592 open issues listed just days after launch, and 15 of those have been already fixed. Precisely, 14 are ready and the 15th is on its way to be fixed. Hill stated that there is no need to worry on the big list of issues, as some of them are just the wishes of users and not actual bugs. Valve's employee posted all the fixes in his post.
Dota 2 community is happy seeing the bug tracker working, and Jeff got his bunch of "thank you"s at the end of the day. They are especially happy that this takes place before the next big Dota 2 event.