readText fails to open file

[GreatEmerald]

This is kind of silly, and I probably missed something, but for 
some reason I can't get any kind of text file opened when using 
readText from std.file. This is what I'm trying to do:

  import std.stdio;
  import std.file;
  int main(string[] args)
  {
      if (!isFile(args[0]))
      {
          writeln("Error: Input file does not exist or is not a 
valid file!");
          return 1;
      }

      auto LTFFile = chomp(readText(args[0]));

      readln();
      return 0;
  }

Nice and simple, right? So I execute it:

  > ./LTF2LIP LTF2LIP.d
  std.utf.UTFException@std/utf.d(645): Invalid UTF-8 sequence (at 
index 1)

And I'm sure that the file is in UTF-8, with LF line endings, 
without a BOM. The same error is thrown when I try any other kind 
of files. So what gives?..