IE 10 *should* implement the necessary interfaces for this preview thumbnail, but it's not working.
On special;upload
Pick a .png file etc and see the preview area open up with a spinner. Never gets filled in with a final image.
Version: 1.20.x
Severity: normal
In JS console:
SCRIPT438: Object doesn't support property or method 'readAsBinaryString'
load.php, line 57 character 397
ho-ho, suspicious...
https://gerrit.wikimedia.org/r/4924 works around this for Special:Upload by
using readAsArrayBuffer and converting the buffer to a binary string (which the
jpeg metadata library wants).
Better fix would be to update the metadata library to accept array buffers as
well.
Also needs fixing in UploadWizard.