Wordpress 2.5 Fatal Error

After my upgrading, I wanted to do a new post but I ran into the following error. Anyone can guide me along to resolve this error?

Fatal error: Allowed memory size of 262144 bytes exhausted (tried to allocate 1028 bytes) in /home/blog/public_html/wp-includes/functions.php on line 160

 

re check ur mysql file

 

What's in your functions.php file on line 160?
You could also go to wordpress support for more detailed knowledge.

 

I checked my functions.php file but I don't remember making any changes to it before.

 

You will have uploaded a new functions.php along with the 2.5 install.

All i can reccomend is disabling all your plugins temporarly and seeing if the problem goes away. If this is the case enable them all 1 by 1 and see which plugin is causing the problem.
Another reccomendation is to visit wordpress.org/support and post a topic there.

 

I just went to take a look and realized that the post was published but without a title. When I tried to publish without a title, no issues. When I tried to publish with a title, the error message appear. Looks like that is the issue. I will check out Wordpress Support as well.