[Double post, sorry. Please remove this one.]

Well, in our case, the problem is that it also empties out all other (custom) profile fields. And if that is by design, it would probably have to do that all the time. Strange thing is, that it only does this when the 'Synchronize roles'-option is checked.

If role synchronizing is switched off, only the default profile fields (which are the fields you listed) of DNN get filled from AD, whilst the custom fields are just left alone. This is in my opinion the expected behaviour, whether role synchronization is switched on or off.

Well anyways, I will log this on codeplex. Thanks for your response. Hopefully we can tackle this soon :)

Thanks Kornelis. You mentioning custom fields also getting wiped out gives me something to work with.

I'll try to give this a look over the next couple of days but have some family issues that are taking a priority outside of work. My mother-in-law had surgery last week, isn't recovering as expected, and our supposed great Canadian health care system is failing her.

EDIT: I didn't notice the first time I looked at it but you logged it on the DotNetNuke Core code support site rather than the project's issue tracker. I've made a copy of your bug report here so that it's within my area to fix/resolve.