I had the weather issue, but it somehow resolved itself, as did the backing up problem (in that it backed up four times the day I downloaded the update).
Issues that haven't resolved themselves:
In Messages app: contact pictures won't appear the majority of the time, but occasionally seem to "fix" themselves at random.
Wifi: my phone refuses to connect to wifi networks, even ones it recognizes and is supposed to connect to automatically.
In Mail app: no text in the body of the email. Both when I try to share a link via email, or when I try to compose a new email (in the former case nothing shows up in the box, and latter case I just can't type anything in the box).
In the Phone app: for a period of time I couldn't make or receive calls (either from within the phone app or from my Contacts app); incoming callers told me my phone rang with a busy signal (usually it just goes straight to voicemail if I'm already on the phone with someone else).
Needless to say, I am not impressed. The contact pictures issue and the wifi issue are my main problems, to be honest. They're just so ANNOYING. I've rebooted the phone numerous times (up to four times in an hour) but it only fixes a couple of problems at a time, and only temporarily (and turning my phone on and off repeatedly sucks battery). Frankly, after the software update this phone is worse than my old BlackBerry Bold 9700: at least when I had an issue with that, restarting it fixed the problem. The worst part is that I'm a total n00b when it comes to phone software, so I can't make sense of the guides that tell you how to downgrade to the older version of the software (and some of them require toolkits that operate on Windows, which I don't use). I've emailed HTC to ask if there's an easy way to downgrade (or if there's another solution to my problems), and if they can't help me I'll be making a phone call to Rogers. This phone was absolutely amazing until yesterday, and now I'm so frustrated I want to throw it at a wall. Hopefully someone will be able to offer me a solution, because I can't live with it for another 2.5 years while it's doing this.