Hmmm... can you try changing the font size to a lower size, as well as messing around with the orientation of the text?
I'm thinking that the text may just be too long to be displayed, and Mac OS X is "cutting it off" in a aesthetically pleasing way (or something like that).
I guess what I'm trying to say is that it is probably perfectly normal -- since the size is 5 digits long, and the free space could also potentially be 5 digits long that it may just be too long a string of text to display, so the system is simply showing the size of the hard drive instead of the size and free space...