http://www.ipsos.fr/CanalIpsos/poll/8074.asp
Reason for no:
1)I don't like the social and economic situation in France = 52% (ie I don't like the government domestic policy, so I vote no to piss the government)
2) It's to liberal = 40%, I disagree, but on topic. Despite I'm not sure the new parts of the constitution (compared to former treaties) was really about this issue.
3) So we can negociate it again = 39% (of course, after years of negociations, all the other countries will be happy to listen to the whinning French and change everything so the French alone are happy)
4) So we can oppose the entry of Turkey in EU = 35%. I don't remember Turkey being mentionned in the constitution
5) It is a threat for France identity = 32%. I disagree, but I can accept this argument, it is on topic.
6) You want to show your discontent to the politicians in general = 31%
7) The results of the EU building is negative for France = 27%. I disagree also, but this is also on topic.
8) It is an opportunity to oppose the government and Jacques Chirac = 24%
So, out of 8 main arguments, I consider only 3 are related to the topic.
And now, if you scroll down further:
Are you ready to support further European construction :
yes = 72%, no = 23%
So I maintain that the French people didn't reject the constitution because they are not in favour of EU