Intermittent charging since jailbreaking

Hi all,

I have been having problems charging my iPhone 3G since jailbreaking it. I thought it was an actual issue with the iPhone so I've already had the phone replaced from Apple. I've also tried 3 different cables on 3 different computers and it will just randomly stop charging. It seems to also be getting very warm. I've tried rejailbreaking using both Quickpwn and Pwnage and still no help. Has anyone else seen this problem??

Thanks!

Well I don't think it's hardware related because I just had the phone replaced today at my local Apple Store. That's why I was wondering if anyone else has seen this problem and if it's something I have installed or what?