I think that's the lightened background, so the background will lighted beneath the pressed keyboard, well, i guess. you can show your work here, if you don't mind @artyom you can change the icons by yourself, find it in usr/share/[your theme]/meegotouch/icons, there are about 10 icons you should revert to black, use MS Picture Manager for the easiest way
I will vote AMD for president next time if I'm having any shares during next meeting.