#2 Detected filesize is huge

[Criptych]

Using GAFFitter 0.6.0 to backup some Steam games, I got this output:
$ gaffitter.exe -t 4.38g *
> [Ignoring] bigger than 'target'(4.38GiB): common (47.33GiB)
> [Ignoring] bigger than 'target'(4.38GiB): team fortress 2 materials.gcf (17179869183.19TiB)
...

The first value is a little low (should be 51.33 GiB), but the real issue is the second file, which is detected as being millions of times larger than my *hard disk*. (The actual size is only 3.18 GiB).

Of possible note is the fact that I compiled under MinGW, and had to replace instances of "lstat" with "stat," but otherwise I have made no changes to the program.