Is there only one search result showing up? If so there just might not be any other posts to load.

there are more posts in English and in French

Which browser are you using? I recommend clearing your cookies and cache or trying a different browser. As previously stated, some topics may not have many posts, so it may not load more posts for you.

Safari an Firefox acting the same, no other messages are loaded

if it is working for you, then forget it, I'll avoid these forums

thanks

Can you provide the URLS of the pages where you are seeing the problem? 

https://turbotax.community.intuit.ca/community/troubleshooting/discussion/02/260

for one

and

https://turboimpot.community.intuit.ca/community/depannage/discussion/02/271