Report chart images missing the axes labels

When in reporting module and wanting to save any of the graphs as JPG/PNG etc then the saved image seems to be just the lines/bars and does not include the axes labels or values/scale.

This seems to render this function a little useles (e.g. the saved image is no use as is when pasting into an email or report etc).  Any assistance on this would be appreciated - i.e. can change settings etc to get these components added to the saved images?

Thanks