image - Sprite PNG is appearing distorted -

we using png/8 sprite on client's website. reporting image appearing distorted him , on other computers on company.

here's how should look:

http://i.imgur.com/wfv7rer.jpg

and here print screen client sent us:

http://i.imgur.com/swkdyku.jpg

i have tried donloading , exporting again, uploading again. problem is: on our computers looks fine, it's hard test it. our client viewing in ie: 11 , google chrome: 41.0.272.118.

has seen type of error before?

it may device-pixel-ratio better 160dpi; that'd throw off css used spriting.

if shows "1" , different value them, i'd dig farther on one. test hitting site iphone or newer android device; have >1.0 pixel ratios.

http://www.devicepixelratio.com/

edit: show across-browsers on end, it's tied hardware, , not ie11.