I have a Umbraco 4.10.0 up and running.

Works flawless but with a slight repeating problem.
It is a multilanguage site in which somehow the old hostnames return.

For example i've tested all languages on a local test environment on which England had an extension domainname/uk and France had domainname/fr.
Now it's all up and running on the live-server on multiple domainnames so it becomes dommainname.co.uk and domainname.fr

This is all managed under manage hostnames.
Strange thing is, when I republish the entire site, the problem is solved.

Is this a known bug, or is it a rights issue or something?

Any help is appreciated.