Hi Klas
If I wanted to use the native Joomla page navigation plugin, I wouldn't have posted here...
The real issue is that the native joomla page navigation only understands the categories so there are two problems here:
1- if you don't have a native joomla menu item on the contents (but only a seblod menu item) the sef urls that are generated on the NEXT / PREVIOUS buttons are completely awful. This is a router related issue
2- the page navigation plugin only orders the contents according to the Article_ID field and among articles in a given category which may not be what you want
This is why it seems there is no solution until the router is rewritten but I hoped someone had a workaround solution in the meantime.
thanks
cyril