BB Curve :: Facebook Gone After Restart

I've had my BlackBerry Curve for about a month and one of the first things I did was download facebook onto it. It was great! Pokes and other notifications landed straight in my email inbox and if I wanted to post something myself or have a look at other people's statuses, I just went into Applications and clicked the facebook icon. Last week my phone crashed and I had to turn it off and restart it. When I got it back on, there was no sign of facebook, either in my applications or in my email inbox. Instead, something called 100% Games and something called Bubble Bash 2.0 now appear at the end of my menu - I never downloaded these, and I have no idea why they are there.