How can I make a theme suitable for all browsers.

[Almond94]

I use forefront theme, it works in most browsers but fails in some. how can I fix this?

[Looking]

You will need to edit the theme to be fully mobile / browser compatible and / or come up with a custom design / select another theme.

[drewactual]

there are validators all over the place... css.. html... xhtml... whatever...

build what you want- alter what you need- when you're finished, validate it, and repair it accordingly. 

i can't tell you how invaluable these things are... I have a combined and minified css as a for instance- it is something like 6k lines long of minified (no blank spaces except where required) wall of text... finding mistakes either made before or after i minified it was a TASK (it was well over 11k lines before being minified)... so anyway, ONE bracket ( ']') instead of a brace ('}') and guess what?  .... validator's caught that.  they fixed it... they pointed out antiquated and invalid mark up... boom- all is well. 

i don't know who designed and launched them, but they each deserve a beer or two!!!!  W3C has the better ones, imHo...

[Almond94]

Thanks, I just saw your reply now. I'll let you know when I succeed