I'm boppin along on foaf xml using .NET Framework 3.5 and after parsing 2k of foafs clean-n-easy I hit this one:
System.Xml.XmlException: Invalid character in the given encoding. Line 39, position 331.
I think it's due to Russian characters in the or something. It's a bummer and I'm skipping it for now but I'm hoping someone's got a tip.