I find this all rather amusing! (even as a potential IQ180 buyer)
After all this time we've wanted Phase to put a killer screen into their backs and when it finally arrives it has issues like this. Now it's supposed to only show up in certain circumstances but still bad IMO. The whole point of the whizzy screen was to have perfect previews but it seems not to be the case. And I know you shouldn't judge the shot exposure by the preview but I feel a good preview image, in combination with the histogram is a brilliant combination of evaluating exposure and the relationship/distribution of that exposure/DR in the shot. I don't think the preview is just for focus check but other may feel different.
Then we are told this will never be on the final CF stored image..... great but this still sits a little unease with me...... "trust us, we're Danish"
Then to top it all off 95% of people on here think this is all great and "understandable", "reasonable explanation", "good compromise", "really surprised at the level of hysterics", "there are always small hiccups" are just normal comments for a product of this calibre.
I know the IQ180 will still take amazing pictures and its a triumph of design in the digital camera world but IMO I'd like a 100% fix not an explanation after all, the main point of the redesign is centred around the screen.