Odd blue lines appearing in white space on screen

Yesterday I noticed some light blue vertical lines showing up all over the screen of my new 24" iMac. They're most noticeable in text fields and along the edges of browser windows on white screens, but occur in every application including the finder (even on dock icons). They appear in the form of tiny blue dots surrounding the cursor, and follow it all around the screen (so I know they're not burned in). Every once in a while they will go away, but this morning they came back. Has anyone else experienced this problem, and if so, what is the likely cause? While it is not a severe issue, it is still mildly irritating and I am hoping there is a way to fix it. Any help is appreciated. Thank you in advance.

I have the same problem, has anyone found a fix for this?
Yesterday I noticed some light blue vertical lines
showing up all over the screen of my new 24" iMac.
They're most noticeable in text fields and along the
edges of browser windows on white screens, but occur
in every application including the finder (even on
dock icons). They appear in the form of tiny blue
dots surrounding the cursor, and follow it all around
the screen (so I know they're not burned in). Every
once in a while they will go away, but this morning
they came back. Has anyone else experienced this
problem, and if so, what is the likely cause? While
it is not a severe issue, it is still mildly
irritating and I am hoping there is a way to fix it.
Any help is appreciated. Thank you in advance.

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Odd blue lines appearing in white space on screen

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