We have just released a minor update to Juicebox. This update is specifically to fix some gallery sizing issues on iOS 7. Since iOS 7 adoption is rapidly increasing, we thought it was worth putting out a hot-fix for this issue.
Juicebox-Pro customers can view upgrade instructions here. Juicebox-Lite users can get the update here. Please report any issues in the support forum. Plugins and templates will be updated shortly.