Is this game patched only to 1.01 where many bugs still exist, for example "can't return the toy" questbug, or it includes unofficial patches made by one of game developers available here:
http://www.patches-scrolls.de/anachronox.php

Or here:
http://www.moddb.com/games/anachronox/downloads/anachronox-patch-101

You can chek the game's version in gog wiki

Thanks - according to the wiki it's fully patched! Awsome.