pbs 80% cpu in activity monitor

[malcrider]

I got a strange message on my mac the other day when I tried to eject my htc desire:

"error: the device cannot be ejected because the cookie monster is chewing the cable."

This obviously freaked me out a bit, so I have been doing a lot of reading trying to work out if there is any way I can find out if there is a trojan on my computer, or anything like that i need to be worried about. I can't seem to find anything that advises about how to find out if my mac has been comprimised at all, except for looking at activity monitor - but I don't know what I'm looking for!

Can anyone help? Ive posted it below. Is it normal for pbs to be 79.5% of cpu? Is there anything here that looks suspicious. Is there anything else I should be doing to fond out what the hell that cookie monster message was about?

Many thanks in advance.

Malc

104 pbs Malc 79.5 3 1.3 MB Intel (64 bit)
180 Firefox Malc 2.3 24 506.4 MB Intel (64 bit)
398 Activity Monitor Malc 2.1 2 17.5 MB Intel (64 bit)
188 Firefox Plugin Process (Shockwave Flash) Malc 1.9 20 47.8 MB Intel
29 loginwindow Malc 0.5 2 7.4 MB Intel (64 bit)
1298 mdworker Malc 0.0 4 34.3 MB Intel (64 bit)
93 SystemUIServer Malc 0.0 4 13.4 MB Intel (64 bit)
122 Dropbox Malc 0.0 17 31.1 MB Intel
94 Finder Malc 0.0 7 20.3 MB Intel (64 bit)
574 DashboardClient Malc 0.0 7 11.3 MB Intel (64 bit)
92 Dock Malc 0.0 3 13.3 MB Intel (64 bit)
1381 Quick Look Helper Malc 0.0 6 5.8 MB Intel (64 bit)
118 Folder Actions Dispatcher Malc 0.0 2 2.7 MB Intel (64 bit)
116 IJEPWAgent Malc 0.0 2 628 KB Intel
115 AirPort Base Station Agent Malc 0.0 3 2.5 MB Intel (64 bit)
108 UserEventAgent Malc 0.0 3 4.9 MB Intel (64 bit)
101 fontd Malc 0.0 2 3.7 MB Intel (64 bit)
97 pboard Malc 0.0 1 484 KB Intel (64 bit)
917 AppleSpell.service Malc 0.0 2 7.3 MB Intel (64 bit)
88 launchd Malc 0.0 2 688 KB Intel (64 bit)
268 System Profiler Malc 0.0 3 9.7 MB Intel (64 bit)
140 dbfseventsd Malc 0.0 1 88 KB Intel