You might also try temporarily removing mapshare corrections. The reason I mention this, is that mapshare may have some blocked roads / delays that may not be valid now.
To re-install MapShare correction into the gps, simple "Update" the gps --- Mapshare will reinstall
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Report map errors at http://www.tomtom.com/mapshare/tools/
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Backup your gps --- for details see
http://uk.support.tomtom.com/app/answers/minor_detail/a_id/13354/
or
http://www.tomtomforums.com/general-tomtom-discussion/17864-how-backup-contents-your-unit-computer.html
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