From the changelog:

0.9.4
Merged Ray, of Light's fixes for empty title and author detection, and modified them somewhat
Merged Ray, of Light's fixes for better handling of spaces in the ]quote[ regexes
Merged Ray, of Light's fix for the Re: regex
Fixed format_time to exclude leading zeroes
Added PointyFilter (aka "shields") - works around css and fixes close tag problems
Added the Your Post Sucks error handling system for postual input
Added 15 second repost timeout (prevents ultraspamming; also part of the "shields")
Added cite attribute to the quote ptag
Added author field cookie
Added auto-NT feature
Added IP logging
Changed the forums to show all threads from the last 5 days (as opposed to 7)
Removed some of the post_output_filter stuff made obsolete by PointyFilter
Probably something else minor that I'm forgetting

• Error handling: It's much much much much much nicer now
  
• Repost timer: Like the log says, wait 15 seconds. Also helps to cut down on double-posts
  
• Cite attribute: Look at my above quote for usage
  
• Author field: IT REMEMBERESSSRSS!!!!!
  
• Auto-NT, the NT you can trust: This will paste an italicised NT to stuff that is HONEST-TO-GOODNESS nt. It will only work if the post is completely empty, so don't go using reply-with-quote when you do an NT. Fussbett: Icon? Or did you already?
  
• Shields: you can't use style attributes for the time being. When I finish the CSS portion of the shields, then you will
  
• I'm starting a thread in Break This Forum for security testing. Come help out if you're so inclined