Odd colour in box surrounds when altering colours

[Guest]

We have altered some of the colour scheme in stylesheet - in partcular around the boxes (categories, manufacturers etc) Although it seems to have worked once the page fully loads with the titles for each box a small square of the original grey colour appears in the upper L/H corner - any ideas how to get rid of this??

 

Any help appreciated greatly.

[Guest]

those squares are actually images located in the infobox folder, not controlled by css

[Guest]

Thanks for your help - changed pics to appropriate colour and it works fine

 

:D