Okay. So I've read all six pages thus far on the gas tank issues. Just inspected my bike and everything is fine (yes I have already voted). After reading the various theories as to why this is happening I thought I'd post my two cents worth.
1. Ethanol in fuel could be the issue... I don't know what the Australian regulations are on this, however, I am confident that our fuel contains less ethanol than the U.S. does - could be one explanation for it???
2. Riding / garaging habits.
Personally, my bike gets ridden very selectively on really good roads - i.e. I don't commute on the bike, and I don't get stuck in heavy traffic etc with it, and I don't leave it lying around for long periods in the sun. Basically my bike is getting ridden always over 60 - 70km/h (and thus cooled by the air), or it is parked in the shade or in the garage - except for a few rare exceptions.
I wonder???? some of you guys who are experiencing problems, do you commute on the bike regularly (possibly leading to the tank being hotter than during a rec. ride) - and also maybe leave the bike parked in the sun for extended periods of time. Maybe leaving the bike parked with more than half a tank of gas in the sun???? Some of this might be exacerbated by the ethanol aspect???
3. You guys in the states seem to have all the bad luck. Remember the dreaded fuel clamp issue - well us guys in Oz didn't experience any of that - my dealer looked at me bemused when I said just about every bike in the states suffered from this defect.
So far (fortunately for us) tank deformation seems to be unheard of down here.