Sorry for the beta expiring on you! Beta 2 is now ready with a few fixes. QuickLook support has been improved to support summary cells and the broken image links are fixed. The esc and enter key will also once again toggle edit states when the appropriate defaults are set.
You can download the beta here and read the full release notes here. And as always, if you have any feedback or bug reports, please contact our Support Ninjas using the Send Feedback option under the Help menu.