This new version of the forum software has what is called 'Enhanced Attachment Uploading' set as 'ON' by default. For those of you not used to using this, or if you're having problems with the new image attachment box where you 'drag and drop' etc, you can revert back to the more familiar set up.
Go to My Settings (top right hand corner of this page) > My Account (on left hand panel) > General Settings *. Scroll down to 'Miscellaneous Options', and the third option is to have 'Enhanced Attachment Uploading' on or off. Choose 'Off', scroll down and 'Save'.
You'll now have a more familiar set up when adding attachments to your post.
* General Settings can also be reached by clicking on 'Forum Actions' (below the Forum. Blogs, What's New tabs above).