Errors in admin panel and on blog

After installing 2.5.1 and fixing some corrupted files I’m getting these error messages in my admin panel:

Under Write section:
Notice: Undefined index: _wp_original_http_referer in /homepages/21/d116687626/htdocs/wp-admin/edit-form-advanced.php on line 5

Under Manage/Posts section:
Notice: Undefined variable: post_listing_pageable in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 59

Notice: Undefined index: author in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 65
Manage Posts

Notice: Undefined index: post_status in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 96

Notice: Undefined index: post_status in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 96
All Posts |Published (35) |Drafts (3)

1 2 3 Next » Show all dates Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 April 2008 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 March 2008 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 February 2008 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 December 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 November 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 September 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 August 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 May 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 April 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 March 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 February 2007 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157 December 2006 Notice: Undefined index: m in /homepages/21/d116687626/htdocs/wp-admin/edit.php on line 157

Notice: Undefined index: post_status in /homepages/21/d116687626/htdocs/wp-admin/includes/template.php on line 290

Notice: Undefined index: post_status in /homepages/21/d116687626/htdocs/wp-admin/includes/template.php on line 292

Notice: Undefined index: post_status in /homepages/21/d116687626/htdocs/wp-admin/includes/template.php on line 300

Under Comments:
Notice: Only variables should be assigned by reference in /homepages/21/d116687626/htdocs/wp-includes/post.php on line 174

These errors are on my webpage:
Notice: Undefined index: cat in /homepages/21/d116687626/htdocs/wp-includes/query.php on line 522

Notice: Undefined property: args in /homepages/21/d116687626/htdocs/wp-includes/taxonomy.php on line 1061

Notice: Undefined property: args in /homepages/21/d116687626/htdocs/wp-includes/taxonomy.php on line 1061

Notice: Undefined index: path in /homepages/21/d116687626/htdocs/wp-includes/canonical.php on line 174

Notice: Undefined index: port in /homepages/21/d116687626/htdocs/wp-includes/canonical.php on line 181

Notice: Undefined index: query in /homepages/21/d116687626/htdocs/wp-includes/canonical.php on line 181

Notice: Undefined index: port in /homepages/21/d116687626/htdocs/wp-includes/canonical.php on line 181

Notice: Undefined index: query in /homepages/21/d116687626/htdocs/wp-includes/canonical.php on line 181

Help! I’m drowning in error messages and don’t know what to do.

Danielle