Add my voice to the chorus. I've already submitted a bug report at
http://www.apple.com/feedback/iphone.html
I first experienced this a couple of months ago but only got around to researching it now. This is a real issue and I hope they update it soon.
Also I wish Apple would take the same tact with updates to the iPhone OS as they have with OS X. It seems that iPhone updates are few and far between, whereas OS X updates (a product with a significantly larger code base than iPhone OS) gets updates every couple of months.
Apple, please issue lots of small incremental updates for iPhone OS where you can fix little bugs like this. We would rather that then the current method of saving everything for big updates and then leaving us in the cold for these small but critical issues.
Thanks,
A