Although I can create an xhtml valid template, I can't guarantee your site will be valid. It's up to you to ensure that all content you add is fully valid. These errors you see are related to your modules and content.
From looking at the validation report, it looks like many of those errors are the result of the "comprofiler" and "groupjive" components. A good deal of them are the result of incorrect or missing table tags, etc. These errors are being generated by the parsing of those components.
Unfortunately many components and modules arent written to be xhtml compliant, or are poorly written in general. You would have to go through the different php files of the particular component and change the code to correct most of these errors. It can be really time consuming, and in the case of these table tags, you would probably have to recode some components output entirely. Not saying that it cant be done, but it isnt always easy.
Your best bet is to either stop using the components in question if you are striving for compliance, or if they are vital to your site, just try to fix any other errors not stemming from the components and leave the rest be. Most of these errors aren't very critical, just improper usage and syntax, and shouldn't affect your site's performance too much, only make for an ugly looking xhtml compliance report. Though, if there are some performance issues or general wonkiness...these components and their output could be to blame.
I've had to deal with this problem many times with certain modules and components ive used, sometimes i was able to go in and correct the code, some were just so bad that it would take me forever to rewrite everything (or i had difficulty figuring out how to rewrite it), those times i had to dump the component or find an alternative if xhtml compliance was necessary Afraid there just isnt an easy fix here
Thanks Kevin,
I guess the best thing for me to do is to just remove the buttons entirely since I don't <b>really</b> need them on my site (but it would be nice) but I don't have much time (I am about to release 5 sites at the same time this month) and I also have just too many components and modules to check at.