Hello,

I had the very same issues and now it seems resolved. I use JoomFish, and I had to change the JoomFish Related Configuration (Components > ARTIO JoomSEF > ARTIO JoomSEF Configuration; towards the bottom of the page). I changed the default settings to these:

Language integration: Do not add

Always use language? No

Translate URLs? Yes

Domain configuration
Language 1: www.mydomain.com
Language 2: www.mydomain.com

It remais to be seen whether it is the solution, but so far it seems to be working.

Cheers,

Laszlo