The redesign from checkboxes in Special:NewFiles to an indescribable new input element, is nearly completely unusable for me! I disable JavaScript when visiting just to get the old interface back so I can't tell what's been unselected!

I'll try enumerating them:

• Unable to determine state (what's missing?)
• Suggests include states that cannot be set (can't list BITMAP twice, but it suggests it)
• Appears to allow free typing input, but preforms unexpectedly behaviors upon focus lost (Invalid input is lost)
• Unusual behavior when clicking text labels
• Backspace remove letters not item
• Remove hot spot (The 'X') is smaller
• Interface misleads into thinking less items means fast load times
• Cannot select text (e.g. select several labels to delete)

Edited to follow etiquette guidelines. Original was written after feeling insulted trying to select WP0 abused media types