Hey.. I guess this is "casual".. but it's Friday so... yeah. I validated one of my Yahoo! mail pages using Firefox's webdeveloper toolbar, and according to w3c, when i made the doctype to XHTML 1.1 i got: 370 errors. 
<!--content-->That's nothin'. I ran into this one site that threw up like one thousand errors. 
'Course they were all like <br>'s that weren't properly closed, but still...<!--content-->What page...?<!--content-->'Twas a long time ago, so I don't remember the URL, but apparently someone who visited this forum knew the person, and notified them of my thread, and the person temporarily/permanently moved their site and put up a rather not-nice notice about how he/she wasn't a programmer, and... well, it wasn't pretty.<!--content-->good ol' frontpage...<br />
<!-- m --><a class="postlink" href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.nmhs.medford.k12.or.us%2F&charset=%28detect+automatically%29&doctype=XHTML+1.0+Strict&verbose=1">http://validator.w3.org/check?uri=http% ... &verbose=1</a><!-- m --><br />
I do believe that if you generate a page with powerpoint, it will have quite a lot more than that though...<!--content-->the validator doesn't report all the errors though does it?<!--content-->Wow I love that page! I'm gonna have to link it whenever I use the word "invalid"... it looks like cat puke..
<!--content-->wow, there are almost as many errors as lines of code 
<!--content-->Nearly? Errors 438, Lines 552= 79.3%<br />
<br />
That's more than nearly... that's too damn close.<!--content-->wow, when i tried to get more errors than lines, icouldn't reach past 70%, i guess they beat me that would take quite a while too fix too 
<!--content-->wow... if you bump it up to xhtml 1.1 you can squeeze one more error outta the page...<br />
EDIT:<br />
as far as ratios go: 102% (<!-- m --><a class="postlink" href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.smhs.medford.k12.or.us%2F&charset=%28detect+automatically%29&doctype=XHTML+1.0+Strict&verbose=1">http://validator.w3.org/check?uri=http% ... &verbose=1</a><!-- m -->)<!--content-->we need a competition going, the site with the most errors. one week to find it, that'd be great<br />
<br />
EDIT: <!-- m --><a class="postlink" href="http://espn.com">http://espn.com</a><!-- m --> on XHTML 1.1 --> 1,000 errors exact in over 1700 lines of code not so high in ratio, under 66%, but high in total errors<!--content-->i think google on xhtml 1.1 is the highest ratio ever! 154 errors in 14 lines of code, thats 11 errors per line!<!--content-->LOL. That's simply sad.<br />
<br />
Note: My homepage is 0.6% invalid, linewise.<!--content-->Microsoft is valid html 4.01 strict, that is IE html 4.01 strict. Mozilla is only tentatively valid .6% never killed someone, i think 1100% might <!--content-->Yes, my site is valid, T35's ad code makes it somewhat invalid. Counting it as my own, however, it's actually much heigher because all my content is wordwarap($foo, 60)'ed. Oh, yeah, and I was bored so I managed to add 42 errors to a page with one line of code: <H2><><><><>Invalid Page<><><><><></H2><P><B><I><U>THIS page is invalid&POORLY CodED<A>&</A>MesT</P></B></I></U><A TITLE=HI><><>...</A></OBJECT>/laYEr></SPan></stYLE></noSCrIpt></tABle></scrIPT></APPlet><!--content-->
<!--content-->That's nothin'. I ran into this one site that threw up like one thousand errors. 'Course they were all like <br>'s that weren't properly closed, but still...<!--content-->What page...?<!--content-->'Twas a long time ago, so I don't remember the URL, but apparently someone who visited this forum knew the person, and notified them of my thread, and the person temporarily/permanently moved their site and put up a rather not-nice notice about how he/she wasn't a programmer, and... well, it wasn't pretty.<!--content-->good ol' frontpage...<br /><!-- m --><a class="postlink" href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.nmhs.medford.k12.or.us%2F&charset=%28detect+automatically%29&doctype=XHTML+1.0+Strict&verbose=1">http://validator.w3.org/check?uri=http% ... &verbose=1</a><!-- m --><br />
I do believe that if you generate a page with powerpoint, it will have quite a lot more than that though...<!--content-->the validator doesn't report all the errors though does it?<!--content-->Wow I love that page! I'm gonna have to link it whenever I use the word "invalid"... it looks like cat puke..
<!--content-->wow, there are almost as many errors as lines of code <!--content-->Nearly? Errors 438, Lines 552= 79.3%<br /><br />
That's more than nearly... that's too damn close.<!--content-->wow, when i tried to get more errors than lines, icouldn't reach past 70%, i guess they beat me
that would take quite a while too fix too <!--content-->wow... if you bump it up to xhtml 1.1 you can squeeze one more error outta the page...<br />EDIT:<br />
as far as ratios go: 102% (<!-- m --><a class="postlink" href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.smhs.medford.k12.or.us%2F&charset=%28detect+automatically%29&doctype=XHTML+1.0+Strict&verbose=1">http://validator.w3.org/check?uri=http% ... &verbose=1</a><!-- m -->)<!--content-->we need a competition going, the site with the most errors. one week to find it, that'd be great
<br /><br />
EDIT: <!-- m --><a class="postlink" href="http://espn.com">http://espn.com</a><!-- m --> on XHTML 1.1 --> 1,000 errors exact in over 1700 lines of code
not so high in ratio, under 66%, but high in total errors<!--content-->i think google on xhtml 1.1 is the highest ratio ever! 154 errors in 14 lines of code, thats 11 errors per line!<!--content-->LOL. That's simply sad.<br /><br />
Note: My homepage is 0.6% invalid, linewise.<!--content-->Microsoft is valid html 4.01 strict, that is IE html 4.01 strict
. Mozilla is only tentatively valid .6% never killed someone, i think 1100% might <!--content-->Yes, my site is valid, T35's ad code makes it somewhat invalid. Counting it as my own, however, it's actually much heigher because all my content is wordwarap($foo, 60)'ed. Oh, yeah, and I was bored so I managed to add 42 errors to a page with one line of code: <H2><><><><>Invalid Page<><><><><></H2><P><B><I><U>THIS page is invalid&POORLY CodED<A>&</A>MesT</P></B></I></U><A TITLE=HI><><>...</A></OBJECT>/laYEr></SPan></stYLE></noSCrIpt></tABle></scrIPT></APPlet><!--content-->