Hi Jacek,
Nice tutorials, really helpfull! I have a suggestion

. Is it possible to have series on developing a SIMPLE tut (like a photo gallery) using html, css and basicly
jquery and
php. I believe it will be cumbersome. But the idea is to show or teach how the pulled from db data, like pictures, will get together with jquery on user's screen so to have interactivity.
Hope my english where understood ,thanks

.
p.s I was recently watching your user login and register tutorials and I saw that at the bottom right of your Firefox you have an error-checker. Is it for HTML? how can i get this?