1) Don't have the 'return bug' in it.
What is the return bug? Tried searching, probably out there somewhere but dont see the need to read up pages of stuff for a one liner answer.
2) Upgraded to the latest versions of tools like newgen (if you use it).
Where can I download this? Heard theres new tools avaliable but looked everywhere, some good links to mapping tools and all that can help make my map will be good. We here at DaL project are fans of DaL, not warcraft. So my noobiness is no surprise.
3) Haven't used any editors like WEU that may cause corruption.
What that?