You can now attach images to your post and they will correctly show the thumbnail. Please note that you WILL NEED TO REUPLOAD ANY IMAGES THAT DON'T HAVE A THUMBNAIL!!

Here's your example:

Click to view attachment

Note that the attachment can be anyClick to view attachmentwhere in your posClick to view attachmentt, but pleClick to view attachmentase, please don't do what I've just done.