I found the culprit!!
A few days after buying a '05 Crossfire I walked into a local supermarket called Winn Dixie (I live in NC) and as I went through the security gate, the alarm went off. Hmmm, I wondered why...
A few days later I went into a Circuit City and upon entering the store the alarm went off. Hmmm, everyone turns and looks at me and what can I do but shrug. Needless to say, leaving the store, the same alarm went off.
Ok, back to Winn Dixie and again the alarm went off. Well, that was it. I went through my pockets and tried the alarm fob for my PT Cruiser, no problem, tried the alarm fob for my home security, no problem, tried the Crossfire fob and the alarm blared! Interesting...
Anyone else had this happen?