iPhone 3GS + 3.1 = AWFUL battery life?

[outphase]

I wish I could do more to help, but I haven't had any battery problems. I can only speak for my experience that I have had good battery life since purchasing the phone.

 

[Xorro]

I am having the same issues.

I haven't changed any of my email / wifi / 3g settings but since installing 3.1 the battery life has been terrible.

I've had the phone about 3 months and typically charged it every 36-ish hours, but now I have to do it everyday.

I've had more 20% battery warnings this last fortnight than in the whole time I've had the phone.

 

[anjinha]

I had quite a few issues with battery life on my 3GS but a restore from new fixed it.