Wordpress does not recognize its version

[neoen]

Hello,
I have Wordpress 2.7 (upgraded gradually from 2.3) and from the beginning Wordpress does not recognize its version. I upgraded to 2.7.1 but update notice is always displayed.

On dashboard there is message "You are using Wordpress Array" (instead of Array it should be 2.7.1). I tried to deactivate all plugins, but it is still here and I am not sure, how to repair it (something wrong in database?). Many plugins does not work due to error: "Warning: version_compare() expects parameter 1 to be string, array given in..."

[FFEMTcJ]

Similar to #8729.

[DD32]

The "Array" part is because -something- has modified the $wp_version value, That value is set in the file wp-includes/version.php, it should look like this: ​http://core.trac.wordpress.org/browser/tags/2.7.1/wp-includes/version.php

WordPress Core doesnt not modify the value, However, Plugins or themes may, Due to no other reports of it, It seems to suggest its something to do with either your install, or perhaps other plugins/themes you have active.

Closing as invalid unless any information comes to light that makes it a WordPress issue.

[pavelevap]

Sorry for bothering you. I tried to deactivate plugins, but problem was in theme (function.php).