3.1 carrier messages?

up here in canada i've been getting texted by fido urging me to update to 3.1, and yet everyone i know who's updated has had sleeping or battery drain issues as a result. several of them have even had to have their phones replaced as a result.

so why on earth are carriers pushing this so hard when there are clearly quality control issues with the update? especially when it seems to be resulting in more cases of under-warranty hardware replacement?

just curious... (and getting mildly irked by the spamming)