Last modified: 2014-05-29 20:08:31 UTC
Images which exceed the megapixel limit still display the preview links under the preview in the image description page: "Size of this preview: 495 × 599 pixels. Other resolutions: 198 × 240 pixels | 396 × 480 pixels | 496 × 600 pixels | 634 × 768 pixels | 846 × 1,024 pixels | 7,258 × 8,785 pixels." Since clicking any of these will only result in an error message since MediaWiki is unable to create the preview, the option should be hidden. Example: https://commons.wikimedia.org/wiki/File:Constitution_of_the_United_States,_page_1.tif
Possibly related to tiff files checking size limits too late.