Brief description: The 0.9.8 release changed things only related to exit from airplane mode and wi-fi. It changes nothing with the yellowsn0w payload itself or the injection vector or the baseband version.
Alternate brief description: The 0.9.8 release has everything to do with boring application-side libraries and nothing to do with the underlying exploit itself.
Longer description: The 0.9.6 version worked for many but it had a hard-coded address for the airplane mode call. The hard-coded address changes depending on FW version (2.2 vs 2.2.1 so far). The 0.9.7 version tried to make it universal and applicable across all future updates. Although it worked for most people, it did have the side effect of keeping wi-fi off after the toggle. The 0.9.8 version fixes that at the expense of going back to hard-coded addresses. That affects us more than you
no - NO UNLOCK FOR original baseband 2.30.00 of FW 2.2.1 - of course it wokrs with 2.28.00 baseband. Only thing I see - bossprefs show airplane mode on when its off after restart