Stacks version 2.1.8 was released this morning. It is highly recommended that all Stacks users update as soon as possible. RapidWeaver should prompt you to update the Stacks plugin when you open your project, but if it does not, you can manually download the update and install it: http://yourhead.com/stacks/
What you need to do. Stacks 2.1.8 resolves the issue by reverting back to the previous version of jQuery. You should update Stacks through RapidWeaver, or download and install the latest version from here. Once you have the latest version of Stacks installed, republish all files from RapidWeaver (File > Republish All Files). This will update all of your Stacks pages to ensure that there are no issues with the functionality of any of your stacks.
If you prefer not to republish all of your website’s pages at this time, then I would recommend you go through every page of your website that was built with Stacks, and carefully examine everything to ensure that it is all functioning as intended.
Learn more about this update. If you are interested in knowing the behind-the-scenes details of this update, then Isaiah (YourHead) has posted a topic to the Realmac Software Forums -- you can visit that topic to get more detailed information.
I hope that this is a relatively painless update for all of you. It is a very rare situation and I don’t recall ever seeing something of this magnitude occur in the past. Rest assured that this isn’t an issue specific to RapidWeaver -- major updates to something like a jQuery library can have ramifications for website developers across many different website development platforms.
A brief note about RapidWeaver Classroom. Things are back in full gear for me following the holidays and the addition of a new baby girl to our family. I am excited about some new tutorials that I’ll be releasing this month, starting with a new SEO topic coming this week. I will post another update with more information very soon!