Dubious securuty?

[jd]

Hello, my names Josh and I'm new to Linux and computers in general and I 
thought you might be able to help me out on a few things.I was trying to 
access G.U.I front for my firewall and couldn't also the computer was 
acting strangely  (more than usual, I'm running Fedore Core 4 and want 
to switch distro's) so I decided to reinstall as I didn't have much to 
lose.With a fresh installation I was  hopeful that the problem would be 
remedied, all I have downloaded and installed to date are the alsa sound 
library's and utillity's and the drivers for my onboard sound (realtek, 
downloaded from the manufacturers site) so I dont think thats the source 
of the problem.Getting back to the problem, I was looking through my 
/usr/lib directory and found the following:
lrwxrwxrwx    1 root root       36 Mar  1 17:51 cracklib_dict.hwm -> 
../../usr/share/cracklib/pw_dict.hwm
lrwxrwxrwx    1 root root       36 Mar  1 17:51 cracklib_dict.pwd -> 
../../usr/share/cracklib/pw_dict.pwd
lrwxrwxrwx    1 root root       36 Mar  1 17:51 cracklib_dict.pwi -> 
../../usr/share/cracklib/pw_dict.pwi
I used emacs to view the cracklib_dict.pwd file and found a huge list of 
names, words etc. I'm mostly worried about my computer being used 
maliciously by a hacker and was hoping you could help me out, any help 
would be much appreciated.

Thankyou,
Josh.