For some crazy reason, there are these boxes that are showing up on line breaks within text on a site that I am working on within Safari version 6.0.3 (8536.28.10) (see attached screen shot)
I've tested this out on a different Mac running the same version of Safari and I cannot replicate the issue. So, I am not sure what could be causing this issue. Both Mac's are running up to date versions of Mountain Lion. So far it only seems to appearing on one particular Mac. The font on the site is using a Google font called Source Sans Pro.