A classic example of solder wicking where the solder has all reflowed and wicked up the component leads. In this case it is clearly the fault of the printed board solderability.

Don't be too quick to blame the PCB supplier, it may be an assembly problem. Copper surface coating can be degraded by washing the board, long storage times in excess of six months and high cure or reflow temperature. Make sure you confirm the true cause of the problem.