vachi

did you make the WP install, or some install system from the hosting company ?

can you try to delete a post and see if it works,

first extract a site xml from wp-admin/export.php

than delete a post, to see if the admin has any database interaction at all

if it can delete posts, than maybe try another browser, or try disabling all of your plugins, you have to update your plugins to new versions because the 2.6 has some core changes

Login to phpMyAdmin connected to the MySQL database server.
Select the database the used by the WordPress blog that the password wanted to be reset.
Locate the wp_users table (normally the last row), and then click on the Browse icon under Action column on the same line.

Locate the user_login which the password want to be recovered and reset, and then click on the Edit button in front of the line.

Under the user_pass field, delete everything in the corresponding Value field on the same line.
Enter a new desired password (case sensitive) in the now empty Value text box, i.e. NEW PASSWORD
Select MD5 in the Function field drop-down menu.
Click on Go button to save and reset the password.
After resetting the password, use the new password to log in to WordPress.

http://www.mydigitallife.info/2008/06/26/how-to-reset-wordpress-password-to-recover-forgotten-secret/

it depends on the theme that you are using with wordpress
if the theme is ajax intensive and is heavily style-sheeted than the psp browser will have some problems,
the admin side also might not come out too good because it uses some ajax

but if its a simple theme and you are not doing any admin stuff on the psp than it should be fine

ahh have you tried renaming the articles page to something else, just as a test

in the page edit the permalink of articles to something else, just to see if that makes a difference, i am thinking that there is something like a plugin that uses the name “articles” so its not allowing you to make one, just guessing, try renaming it and see what happens 🙂

probably you do not have perma links turned on,
in settings wp-admin/options-permalink.php choose one of the structures except default