Hi, lately all sorts of different images have been acting all glitchy on my macbook air. Sometimes the background of webpages will be all glitchy and show images from other parts of the screen. I don't a screen shot of when the webpages are screwed up, but here is an example with icons in finder:

You can see the icon on the far right is a combination of a bunch of other images when it's supposed to just be an image of sheet music. This has been happening all of the time.
This is what the icon looks like when things aren't all glitchy:

I wish I had some better examples, like when entire windows have this type of glitches. Is this a virus or? I've tried doing a virus scan with ClamXav, which just as I was looking for the name, also has a glitches icon:

Anyone know what's going on?

You can see the icon on the far right is a combination of a bunch of other images when it's supposed to just be an image of sheet music. This has been happening all of the time.
This is what the icon looks like when things aren't all glitchy:

I wish I had some better examples, like when entire windows have this type of glitches. Is this a virus or? I've tried doing a virus scan with ClamXav, which just as I was looking for the name, also has a glitches icon:

Anyone know what's going on?