Paul, the width & height input boxes don't work anymore on the insert media dialogue box. Thanks to a WGT update in April.
DonCaron: How do I get it on WGT using the editor? The way we used to do it, doesn't work anymore.
Don, use the Direct Link from imgur, not the Image Link. When posted, if your image is too big, edit it using the the Edit Image button on the forum message editor toolbar (select the image first otherwise the edit image button will be greyed out), then put 100% (don't forget the % symbol) in the first dimension box, leave the second dimension box blank, click the update button, then post your message again.