Wrong style showing in certain browsers for admin

[محروم.كوم]

A few months ago I duplicated and editted the existing theme on a website I maintain* then set the new duplicated version as the default.
However* I have a problem that only seems to affect my admin account.

If I view the website without logging in* I get the new style* however* if I log in using my laptop (both IE7 & FF)* my mobile phone (Nokia N96)* or using FF on my desktop* I get the original style showing.
Yet if I use IE7 on the desktop* I get the new style.

If I change the style on the affected browsers to the new style via the style manager* the new style will remain until I logout* but as soon as I login in again* I'm back to the old style.
This isn't computer specific* as the laptop and phone have both been replaced since I started getting this problem.


Anybody know what's causing this? __DEFINE_LIKE_SHARE__