Adobe Illustrator CS4

Not that I really know a lot about this program, but seriously. I made a textblock, put a sentence in, and then wanted to see what it would look like with different fonts. So I hilight the font-select box and start using the down/up-arrow to scroll through the list. However the piece of shit locks all the time at certain fonts and the even if I slam the up or the down-arrow the list get stuck at that particular font. Very annoying and I closed down the program very quickly. Piece of shit.