Problem with icons.

Hi,

I have a problem with icons on the menus and toolbars.

Some icons are black background (They are designed with transparent background). The funny thing is that 2 icons exactly the same (image features), one looks good and another not.

Regards,

PD: Attachments:

arki_cmc_16.png   ---->  looks bad.

arki_cma_16.png   ---->  looks good.