Is an unsquare tank structurally unsafe?

[cato]

I recently acquired a 220g tank that is about a 1/4 inch out of square on one side. Will this have detrimental effects on it's structural integrity? It is a few months old and built from 1/2 inch glass.

I personally think it is fine due to the fact I have seen custom tanks in every shape known to man including a trapezoid. Any input is appreciated. Thanks.