@micro6500: <i>But the IPCC teams are a small collection of I would presume selected scientists who most had to pass the 2,3 and 4 as “yes” test to get the gig.</i>
The process is actually quite open, with the reports written by the "core writing team", namely those with expertise in the relevant areas (or would you prefer that they be written by people ignorant about those areas?) but with plenty of opportunity for comment by anyone who cared, expert or not. 3,600 individuals were nominated for the core writing team, with 830 selected from over 80 countries: 36% from developing countries, 21% female, and 63% fresh blood who had not previously contributed to earlier reports. By region, there were 8% from Africa, 16% from Asia, 6% from South America, 28% from North and Central America, 7% from the South West Pacific, and 34% from Europe.
The number of people involved, including the above statistics, can be seen <a href="http://www.ipcc.ch/activities/activities.shtml#.UMzUkuB2MiA" rel="nofollow">here</a>. A total of 142,631 comments were received, all of which were duly recorded so that anyone who objected to some detail of the report would have their objection on record.
So if you had an objection to some detail but did not raise it then you have only yourself to blame for the report being unaware of your objection.
Those who did raise an objection but felt their objection was neglected can look at the other comments to see whether anyone else had the same objection. With over 140,000 comments you can imagine that competition for attention by the panel is pretty stiff! So if you were alone in raising that particular objection then it would be understandable if the panel found itself unable to spend much time on your objection --- you would then not be part of the 3% minority but rather of the 0.0007% minority raising that objection.