XmlSerializer CS0016 exception on Windows 7 with cyrillic user name

Hi,

I get exception in .Net 3.5 WinForms application on W7 with Cyrillic user name, like this:

-- Unable to generate a temporary class (result=1).
error CS0016: Could not write to output file 'e:\Users\Вася\AppData\Local\Temp\7i5euue0.dll' -- 'The directory name is invalid. '

at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)
at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)
at System.Xml.Serialization.XmlSerializer.GenerateTempAssembly(XmlMapping xmlMapping, Type type, String defaultNamespace)
at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
at System.Xml.Serialization.XmlSerializer..ctor(Type type)

This code works with English user name and it works on Windows 8 even with Cyrillic  user name.

What should I do?

Google suggests to switch to the NetDataContractSerializer or use Sgen.

Is it a known bug or what?

Any other ideas?