i try all Igo models android and wince. only in Igo8 you see all streets names on roads
I did some sys.txt changes to add more labels in both primo and nextgen... so it is possible, I have way more bubbles than that screenshot. On mine its just missing a few streets, he is missing 90%.

Please, does someboby have any idea ???
Sure.. open adb shell and take a logcat while its starting. You will know pretty quick.