I've just found it in the Extensions Management / Common but it's already set to No :(

I even tried to set it to Yes and it has no effect on the URL structure ...

Dear Dajo, I can't find the option "Add menu title to URL" vcan you tell me where it is ?
Thanks

Dear Dajo, thanks for your instructions. It cut one bit of the problem.
Now the situation I'm experiencing is really annoying : I have my joomla 1.5 website running with Joomsef active and giving for example this path : www.montresdesign.com/videos/blog
In my new site (in pre production now) running joomla 2.5 and Joomsef the same content is displayed this way : www.montresdesign.fr/montres/videos
So as you can see, on the joomla 2.5, the structure is adding the category in the URL even if I set add categories url to no
And on joomla 1.5 the blog indication in the url is appearing while it's not the case in joomla 2.5

Thanks a lot for your help

Hello,

I've just installed Artio JoomSEF on my brand new 2.5 joomla website and I'm facing a strange problem I can't fix.
(I previsously ran JoomSEF 3 on my 1.5 joomla website)
the URL then was pretty simple www.mydomain.com/subcategory/article_title

Now with the new installation I get the following structure :
www.mydomain.com/subcategory/category/subcategory/article_title

How can I get back to the settings I got with joomla 1.5 and enabling then a solid url constancy ?

Thanks for your precious help