IntegraMOD HTML Validation Errors

[Dr. Bantham]

Considering the apparrent incompatibility of IntegraMOD 1.4.0/1.4.1 with the Opera browser, I decided to run a test with the HTML Validator at w3.org.

Here are the results for popular forum platforms:

0 Errors with [url=http]HTML Validation - vBulletin[/url]
4 Errors with [url=http]HTML Validation - Invision Power Board[/url]
7 Errors with [url=http]HTML Validation - phpBB[/url]
188 Errors with [url=http]HTML Validation - integrmod.com Portal[/url]
247 Errors with [url=http]HTML Validation - integrmod.com Forums[/url]

My IM 1.4.0 site received 194 errors on the main portal page and 85 errors on the forum page. I turn off universal portal blocks using the three column layout, therefore this could account for the reduction in errors when viewing my forum.

How much of a concern are these code errors? Could they be the culprit behind problems with Opera? Beyond browser issues, is it potentially slowing the speed of the site?

To be fair, I found one forum platform that did worse than IM 1.4.0 and 1.4.1. Wekke's Integramod 2.0 clocked in with one less error on the portal, with the close error count likely due to the fact that they both share the same version of IM Portal. However, the IM 2.0 forum page generated a staggering 761 errors. Ouch.

[Helter]

many of the errors are not really errors. For example, the validator reads the qbar links at the top of the page and returns errors, saying that you cannot have links there. The table is there to display the qbar. There is nothing wrong with it, however, because the qbar is essencially just links, you get errors. It goes on and on. Over a year ago I decided to attempt to correct all the errors. It is impossible. Nearly every .tpl file would need to be re-written and many php pages. Many were written by mod authors using various versions of html and js, and who knows what wysiwyg html programs.
Look at phpbb's index. It has 9 errors and there are no mods.

look at this link http://duiplayground.com/IMPortal/index.php
the default template is baSicBLu. I just wrote it and as a plain html file it validates with no errors. When I add it to a plain phpbb/IMPortal forum, it now shows 22 errors
here is the template before adding it to phpbb http://www.duiplayground.com/temp/