Avatars uploaded as .gif are not displaying in IE, but fine in any other browser. The avatar itself shows fine in IE when viewed with just the link for the avatar, but not when it should be displayed in the forum.
Here's my test post: https://www.windowsbbs.com/threads/avatar-test.110833/
The avatar doesn't show in IE (in my case I tried IE11/Win10 and IE8/WinXP).
When you go to the direct url's for the avatar it shows fine in IE: