I just went thru something similar moving from one script to oxwall, but no domain change.  But this still applies.

go thru your db, export a copy and open it in programmers notepad or notepad and do a search for your old domain name, you will be surprised how many places you find it.  Once you get that done everything should work.   That is pretty much all i had to do was change the db values where i found them, and there are quite a few.   And also make sure my config and my htaccess was set up properly as well as make sure the ow_userfiles has the right permissions.

Check the ow_userfiles permissions first because if that works then you wont have to do the rest of it.  

someone should build a Clone Tool / Migration Tool, you would sell a lot of them

yes I've just been traveling working on other things, eventually I'm just going to use another them and move everything over via phpadmin

but till then I am too busy to work on it so I am just leaving it as is, I have a few different sites that are getting decent traffic so I am using those for data mining.