Visual Studio :: 2010 Missing Character On XP

my visual studio 2010 has the following problem, can't see the missing characters. Everything is fine, if I do a copy to notepad, it will show up. The intellisense is fine. (I manually removed the characters after copying here). My beta2 started to have the problem a month ago. Now I installed RC, same problem. My windows is XP SP3.

using ystem;
using ystem. ollections. eneric;
using ystem. inq;
using ystem. eb;
using ystem. eb. vc;

namespace vcApplication3. ontrollers
{
public class ccount ontroller : ontroller
{
//
// : /Account/
public Action esult ndex()
{
return iew();
}
}
}