Guys, I'm just taking a deep breath and try to calm down.
First of all I want to state that I am a long term Phase One customer and - in my opinion - a very loyal one. In the last years I bought a P45, 2x P45+, a P65+ and an IQ180. On top of that I upgraded my P45+ to another P65+ as a backup for cold conditions only recently. I do actually own an arsenal of 4 Schneider LS-lenses, 4 Phase One lenses and some older Mamiya glass.
Overall I am very convinced of the Phase One system and it's quality. I have invested in the right systems and would do it again. Conclusion: I want to clarify I that have absolutely no intent to complain about Phase One in general. However....
After reading this thread it seems quite obvious that there is a general problem with the cold resistance of the IQ180. Under cold conditions the IQ180 misinterprets a fully charged battery as empty and no shots are possible - rightaway or after a very short time.
Today I have talked to Phase One Germany again. They asked me to thoroughly read the specifications: The IQ180 is rated for operation no lower than 0°C. And this specification is met.
I replied that in my opinion there is a general fault with the cold resistance of the IQ180 and that they should work for a fix. When eg Mercedes recognizes a problem with one of their cars they either initiate a recall immediately or they do a "silent fix" and change the problematic part when the car is in the garage the next time.
After this discussion I had a look at Phase One's press release for the IQ series. (www. phaseone.com -> News and Press -> Press Releases):
"Phase One announces IQ series digital camera backs - Copenhagen, January 24, 2011
[...]
Reliability and Service
Pro Photographers can rely on Phase One IQ digital backs to get their jobs done. Their highly durable build quality is designed and tested to work in the toughest environments, including extreme heat, cold and humidity. All Phase One products represent long-term investment value with superior service. For professionals, this protection is priceless, especially when shooting in unfamiliar situations and locations around the world."
That has exactly been my experience in the past for my P45+ and the P65+: They did work under tough conditions at -25°C without any problems. I was a "happy camper" with this system.
Phase, please don’t let us alone with the IQ180 problem in cold conditions and work for a fix. The whole community of professional users will expect this and will show their gratitude by staying loyal users in the future; something I am sure PhaseOne will be interested in.....
Gerhard