Battery draining on iOS 4.3.2 on iphone 4

Since i have updated the software to 4.3.2 on my iphpone4, the battery doesnt last at all. I check the battery at night, which is showing as 45% but in the morning, the phone is dead. I am using the phone exactly the same as it was on the previous versions. There is nothing changed, no apps downloaded. Is anyone having the same issue, or can anyone advise if there is a fix for this. This is a nightmare that every morning the phone is dischared and i have to charge it the first thing in the morning.

Please please please fix this, if this is an issue or advise.

Thanks.