Please get rid of the captcha on the user preferences page!
 

I tried to change my posts/page preference from 11 to 17, but I got this:

[CODE]You did not enter the correct format for the What year did Bernard Hinault win his first Vuelta a España? field. Please read the field description for the expected format.[/CODE]Please let me change my preferences without having to enter that. It's EXTREMELY annoying. It doesn't need to be there. I mean, seriously! All I see are options to allow vCard download, receive email from admins, subscription options (yes/no on email notifications), PM options, thread display options, time zone, and message interface (standard vs WYSIWYG). None of that could be of any use to spammers.

You should only have ever needed to enter that once.
It is just the year as normally formatted in arabic numerals YYYY.

I know, but it's not needed on that page. There's nothing there that would be of any interest to spammers, or bots in general. Please get rid of it. It only needs to be on pages where spammers might put their advertisement links (initial registration page, changing website URL, etc.), not on display preferences.