errors, errors and more errors

Currently I am using WP 2.23. I have been wanting to upgrade to 2.3, but I keep getting DUPLICATE key errors like what was described in this post.

So I quit and reverted back to 2.23 and began to notice the following error messages:

WordPress database error: [Unknown column ‘option_description’ in ‘field list’]
INSERT INTO wp_options (option_name, option_value, option_description, autoload) VALUES (’category_children’, ‘a:0:{}’, ”, ‘yes’)

So I followed the instructions at this link and was able to resolve that problem.

This whole process started because I have been getting a slew of errors from 2.23 like the following:

PHP Warning: Cannot modify header information – headers already sent by (output started at /home/blacki5/public_html/wp-includes/wp-db.php:132) in /home/blacki5/public_html/wp-includes/feed-rss2-comments.php on line 2

and the following just started yesterday:

PHP Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/blacki5/public_html/wp-content/plugins/enhanced-wp-contactform/wp-contactform.php:233) in /home/blacki5/public_html/wp-content/plugins/enhanced-wp-contactform/wp-contactform.php on line 233
[Sun Feb 24 06:12:36 2008] [error] PHP Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by (output started at /home/blacki5/public_html/wp-content/plugins/enhanced-wp-contactform/wp-contactform.php:233) in /home/blacki5/public_html/wp-content/plugins/enhanced-wp-contactform/wp-contactform.php on line 233
[Sun Feb 24 06:12:36 2008] [error] PHP Warning: session_start() [function.session-start]: open(/tmp/sess_319bb7ead46ca36be042030031957bbb, O_RDWR) failed: Cannot allocate memory (12) in /home/blacki5/public_html/wp-content/plugins/enhanced-wp-contactform/wp-contactform.php on line 233
[Sun Feb 24 06:10:44 2008] [error] PHP Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/blacki5/public_html/wp-content/plugins/random-posts-widget/randomposts.php on line 87
[Sun Feb 24 06:10:44 2008] [error] PHP Warning: Invalid argument supplied for foreach() in /home/blacki5/public_html/wp-content/plugins/widget-category-cloud/category-cloud.php on line 164

I was getting a bunch of fatal errors that were pointing to various plugins that were unused, so I deleted them (Currently, the only plugin I have enabled is Spambam). This wiped out many of the error messages, but the ones I listed above still exist. I also checked to see if there was any whitespace on line 2 in the feed-rss2-comments.php file as indicated in the first error I listed. From what I can tell, I did not notice any extra spaces.

I listed both problems here because I need help in figuring out if it would be easier to fix the upgrade problem or to maintain my existing 2.23 version. I am completely open to both options.

Last point, when it comes to understanding PHP and other related programing, I am far from being a pro. Thank you for your help.

Other stuff:

I tried to run the export tool in wordpress that would create an xml and that just produced a blank page with no file.