don't click on the Google ads for "free" smileys from anything related to "smileycentral".
The downloads are infected with trojans (probably keyloggers, I didn't ask my AV for more information on them).
Download links deliberately maskerade an exe-downloader attempting to install a browser plugin as a simple zipfile in the status bar, making it deliberate hiding.
I have been suspicious about them for a long time and decided to give it the lithmus
test with a freshly update AV scanner and it immediately sprang into action.
If you do download the only ones smiling will be them...
admins please try to stop this thing in ads (might mean going through Google).