[@bigmizar Participant 15 years, 1 month ago]

Finally, I’ve decided to add my fields directly in the database, so everything is working fine. Anyway, I won’t need to modify those fields really often.

It’s probably a conflict with a plugin (or my code). I need to do a couple of tests before.

[@bigmizar Participant 15 years, 5 months ago]

Sorry, I didn’t respond faster… I thought I would received an email when someone answer to me.

As soon as I arrive home I will try both suggestions.

But after that, I will update to WPMU 2.8.2 … so the problem will probably disappear.

Thanks a lot.