Zenoss 4 - Chrome zooming issue

gistfile1.txt

# dirty, not tested hack http://www.zenoss.org/forum/8806
# it will solve issue with Chrome, but question is what is broken after this hack?
sed -i -e "s#        request.setHeader('Content-type', mimetype)#        if mimetype == 'image/png':\n            mimetype = 'application/javascript'\n        request.setHeader('Content-type', mimetype)#g" /opt/zenoss/Products/ZenRRD/zenrender.py

# or edit /opt/zenoss/Products/ZenRRD/zenrender.py
original:
        request.setHeader('Content-type', mimetype)
edited:
        if mimetype == 'image/png':
            mimetype = 'application/javascript'
        request.setHeader('Content-type', mimetype)

I'm late in the game on applying this patch. Has anyone been using this patch for a while and can confirm that it doesn't break other functionality? Thank you for the post as this was very hindering not being able to zoom in on graphs.