looks like you were ahead of the curve - some sizes are now sold out so perhaps you were trying to change at the same time the site was updating
it could be a browser/mac issue. Are you doing the changes via the product merchandising (back end) or on the product page?
like @KeegansCreation I could easily swap between sizes with no issues (firefox/windows)
suggest you try a different browser maybe?
looks like you were ahead of the curve - some sizes are now sold out so perhaps you were trying to change at the same time the site was updating
I'm using updated chrome browser. It just updated for me a couple of days ago. It seems as though if you take a guest book already created. Change it to the big square size it doesn't show the graphics or text correctly in the design tool. It looks blank. Then if you go to the saved designs and click on it, it says the product doesn't exist.
I tried making one from a brand new guest book. I clicked on the big square size and in the design tool if you add text, it doesn't show on the design window. You can't add images either and have them show up but they do show up on the product page when you exit the design tool. You can't design though without being able to see the elements and move them around, resize, etc.. If you add another text box it goes on top of the first and you can't move it. It is just a little circle on the upper left of the design window.
IN the image below you can see in the preview window on the right it shows the words "add text" but on the design tool window it shows nothing.
The guest books seem to be in stock so that is not the issue them being out of stock like someone else thought. I tried changing the size to a smaller size and the design tool worked fine and I could see the text. It seems to be just the biggest square size that has the issue.
