I get two errors whenever I deploy a package and change the default database name, however the package seems to deploy correctly. I do not get the errors if I use the default database name.

1) Creating datafile '(new DB Name)' failed

2) Dropping datafile '(new DB Name)' failed

See attached error log for details.

It looks like it's doing some case-sensitive comparision when it should be doing it case insensitively.  You deployed the database once with the name in all caps, and then with the first two letters lower-case.  I'll log the bug and check it the next chance I get.