Summary

Unable to load user avatar in IE 11 if it's PNG file with JPEG extension.

VirtualBox:~/Downloads$ file useravatar.jpg 
useravatar.jpg: PNG image data, 48 x 48, 8-bit/color RGBA, non-interlaced

Steps to Reproduce

1. Upload a user avatar which is PNG file with JPEG extension
2. Open User Profile https://<instance URL>/secure/ViewProfile.jspa?name=<username>

Expected Behavior

The user avatar is shown.

Actual Result

The user avatar is not shown as the confirm button does not function.

Workaround

1. Upload a new user avatar or change the current avatar file extension to PNG
2. Use other browser (i.e Chrome)

Notes

Found below error on Network Console:

Column: 793DOM7009: Unable to decode image at URL: 'https://<instance URL>/secure/useravatar?size=small&ownerId=<username>&avatarId=11700'.File: useravatarDOM7009: 
Unable to decode image at URL: 'https://<instance URL>/secure/useravatar?size=small&ownerId=<username>&avatarId=11700'.File: useravatarDEPRECATED -