I must say, im running on Nokia 5800(s60), GarminMobileXT_5.00.50.
Aways runnining nonunicode maps, no problems whatsoever, respectfull to file size limit which results in smaller eu map coverage. Of course, map detail level to lowest.
Tryed newer versions but had problems like... to try to conserve battery shut down nav software, after restaring takes long if ever to find sattelites (even the satellite signal shows strong). Helps shutting down app once more.
For all those who have problem with the speed (slow) of displaying when searching POI-s imidiately after turning on the app, just image the mSD card and pour theimage back to mem card using tools like ghost. Restart the unit and that speeds up the proces since reimaging defrag properly. Applicable to every unit