Hello,
I have Wordpress 2.7 (upgraded gradually from 2.3) and from the beginning 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..."
Thank you very much for your ideas!