Some of the cool new features in WordPress 3.3 are compelling reasons to upgrade. In fact I plan to upgrade a few of my sites when things quite down around here. However we’ve seen at leas one plugin (for now) cause major problems (like you can’t login) that makes me think you should use a little caution in making the decision to upgrade. I know, I’m starting to sound like a broken record each time a new WordPress version is released. But that’s just how I roll.
Anyway several people report that sites running the Popup Domination receive an error message when attempting to log into the WordPress Dashboard. I’m sure the developers of Popup Domination will have a fix for this pretty quickly. So if you use this plugin check to see if an update is available BEFORE you upgrade WordPress…particularly if you can’t live without it.
The WordPress updater will highly recommend you update your plugins first. Look there for the new version of Popup Domination. It will save you a lot of grief.
I’m sure there are more, so again use caution. And if you are a WishList Member user please do not upgrade at this time. I know it’s tempting, but this app is mission critical to your business. So why tempt fate.