Stylesheet problems across browsers

[frasersfotos]

Hi, hoping some kind person can help me

I have recently discovered that the stylesheet in my photoblog is not working on the PC version of Firefox whilst working fine on the Mac.

I also have instances where I have seen the stylesheet fail on Internet Explorer however it of the five windows systems I tested only one had a problem, the rest worked fine.

Any ideas how I can make it work on both IE and FF on a PC.

The site in question is http://www.frasersfotos.com

Thanks in advance.

Gordon

[reflejandome]

validate your css is the best way

[frasersfotos]

I did validate it in W3C removing a big chunk of code as suggested by the validation to no avail although the those systems that were working before were still working even with their caches cleared.

I started switching templates to see if it was a more common problem (it was not) and afterwards I found that FF on my main machine iMac stopped reading the CSS in Simplicous

It still seems to work on Windows IE and even some Windows FF just not on all and now not on my Mac.

Any further help would be greatly appreciated.

Thanks

[frasersfotos]

Update - I think I've sourced the problem to some old style switcher code that wasn't completely removed.

Thanks