Y axis scale appears differently on different browsers

Hi,

I am displaying reports on a dashboard in jaspersoft, but the y axis scales for the graphs appear differently on differnt browsers on the same machine (MAC OS). In the attached chrome.png the scale is 0k, 10k,20k,30k,40k. Whereas in safari.png the same graph shows 0k,20k,40k. Is this a feature or a bug ? I tried collapsing and expanding the viewport too but the same persists. 

This is causing issues when people share screenshots with each other.