Weird Image Distortion Macbook air

[roccobladr]

I have a 2011 Macbook air. Recently I started noticing that some images will glitch and distort like this attached file. This can happen randomly on a webpage image or even opening a PDF in preview.

Any idea what the problem might be? I recently had service work done to replace the screen in November and it is not under any other warranty.

 

[ApfelKuchen]

It seems like a memory problem. It doesn't look like a single page that's not rendering properly. Do you have a lot (like 20 or more) open Safari windows or tabs? When's the last time you full restarted your Mac (not just Sleep)? How much RAM do you have?

 

[roccobladr]

It seems like a memory problem. It doesn't look like a single page that's not rendering properly. Do you have a lot (like 20 or more) open Safari windows or tabs? When's the last time you full restarted your Mac (not just Sleep)? How much RAM do you have?

It seems like a memory problem. It doesn't look like a single page that's not rendering properly. Do you have a lot (like 20 or more) open Safari windows or tabs? When's the last time you full restarted your Mac (not just Sleep)? How much RAM do you have?

I have 4GB RAM. I do have about 8 tabs open but nothing out of the ordinary. Activity monitor says I'm using 3.64GB/4GB of the RAM.