We’ve been testing MoreBlu in Chrome, Safari, Firefox and IE9. All browsers can currently use MoreBlu in “view only” mode—that’s a permission setting for users who need to view designs, make comments, reorder items and have general access to MoreBlu. However, if you want to upload files via drag and drop, IE9 won’t currently work. There appears to be a fix on the way—IE10 will support the HTML File API.
If you’re an IE9 user, you can use MoreBlu but you just won’t be able to upload files. You can still view work and collaborate with notes and comments (which is what 99% of customers do when using MoreBlu). If you need to upload files, jump over to Chrome, Safari or Firefox for now.