This behaviour happens with my iPhone 4 running iOS 7.1.2. only occurs when pressing the keys quickly, the + sign clicks but is not registered so the calculation becomes 1 + 23 or 12 + 3.

On my second pair of progressive lens. my next set of glasses will be two sets. One progressive for regular use, and the other for use with computer. computer use is really slightly longer distance to reading and reading distance for manuals or paper on your desk. no need for long distance view like what would be needed to drive or see outside a window.

Can MCX, Walmart, CVS, Rite-Air, etc. be brought up on anti-trust charges. using their retail strength to gain control in another business. Is there any reason why these companies cannot have both systems running and make the customer choose.