As we all noticed that DotA 6.73 was carrying a lengthy list changelogs containing lots of new items and heroes. In the light of these changes there's a prominent chance that some bugs might occur. So in this prospective IceFrog will be releasing DotA 6.73b as a bug fix patch to address those bugs.
Final Update: DotA 6.73b Map is officially released along with changelogs.
We can just hope that it will remain a stable map and bugs/glitches won't appear in it. We will update this page soon with DotA 6.73b map and changelogs as soon the map releases. If you have encountered any game-breaking bug or exploit in 6.73, please report so it get fixed in next update.
DotA 6.73 Changelogs