Some Nagging Wordpress Issues I'll Help You Solve

The funny thing about Wordpress is the way it behaves differently across my different webhosts - Dreamhost, Media Temple and A Small Orange. My food blog is hosted on MT. Before I manually upgraded it to Wordpress 2.7, it was languishing in the old 2.3 version. Back then when 2.3 was the "in thing" it was already having issues with WP's AJAX features. But I learned to live with it. Yesterday, while I was making a new post about an Indian Restaurant, the autosave feature was acting like its usual crazy self. It displays an error message "You do not have permission to do that". Ok, so who does? Like before, I'm not allowed to make new categories. I was forced to create them in phphmyadmin. I don't care for WP's AJAX capabilities other than autosave. Otherwise I can totally do away with them. I was determined to see what was causing the problem. It turns out that it had to do with permissions inside the wp-includes file. But I wonder why it *only* happens on my food blog, and not on my photo blog. Anyway, if nothing else has worked for you, open up your FTP client and connect to your web server. Chmod the wp-includes folder and everything in it to 644. I have tried all combinations of permissions and in this is the only that worked for me. If you can provide alternative solutions, please let me know by leaving a comment below. Another bug I encountered on my food blog is the news on the dashboard aren't showing up (solution still up in the air). UPDATE: I looked into the second bug further and discovered that it is intertwined with the first bug. If I set the wp-includes folder to 644, the problems with autosave and adding categories go away, but as a result, the dashboard news fails to load. To fix it, I set the permissions of the wp-includes -> js -> jquery folder to 744. Still scratching my head over this.