you can test the teleatlas maps here:
http://mapinsight.teleatlas.com/mapfeedback/index.php
And add the changes... i just did since their missing a major highway, intersection and small town here in el paso....
i got the issue with the memory cache.... (but it was from just using change 3d car)
problem was fixed by deleting iGO folder in user data.
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(my home screen)