Topic: templates and css.
In main.tpl have i inlcude my own style sheet file in the head.
It works perfect until i chose a specific theme in options.
So it seems what if i chose a specific theme it's not changing in <pun_head> but in pun_body> or?
Re: templates and css.
No. It is changing in <pun_head>. If you have not already done so try putting your stylesheet link between <pun_head> and </head> so it comes after the stylesheet link inserted by PunBB.
It should make no difference whether you have selected a style or are using the default style. Either way the stylesheet link gets output in the same place. I suspect the reason you notice the difference is the default style does not conflict with your own styles. Try changing the default stylesheet and see if you get the same problems.