[Beta 2, C#] Problem saving Settings when collections are involved

this has been bugging me for a while - there seems to be a bug (or more likely, I don't know yet proper way to use it) when some of the Settings are collections.
I am using Settings designer and rely on build process to generate strongly typed Settings.Default class for me, and that works fine. But if I choose a NameValueCollection or StingDictionary or something similar, I cannot save the settings. I have manually set the "key" of this entry to a valid value just prior to calling Properties.Settings.Default.Save but I always get null reference exception. I don't know if it matters WHEN Save is called - I call it in Main as a last function call.

Is the XML serializer capable of saving/restoring collections in beta 2, or was it not supposed to work ever?

Thanks for any hint about this. Note that there was a post few months back describing exactly the same issue, but nobody replied

[971 byte] By [DrazenDotlic] at [2007-12-16]