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Actually, I can't see this happening on the few apps that I use on a regular basis (iBooks, PDF Expert, Mercury browser, OneDrive).
 
I sent it for warranty later today and they said it might be a display hardware issue and was just a coincidence that it happened after the 7.1 update.

Its very strange because I have also searched the web for related artifact issues on ipads and couldnt find anything.

Ill get a replacement after tomorrow.

Hopefully it will also come with a good display with no yellow tint and bookspine effect.
 
The yellow screen thread has been quiet for a while so maybe they have sorted that out. Or people are just tired of complaining on deaf ears.
 
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