XY Graph shows phantom dots when zoomed

I'm plotting a large data set versus time in an XY graph. When I zoom in, the plot shows the data, plotted in lines, but also shows a large number of phantom dots. When setting the plot to "lines & markers" the phantom dots disappear. See attached jpg.
Has anyone seen this / have a solution?
Attachments:
XYGraph_Phantom_Dots.JPG ‏111 KB

It seems to me to be either a bug with graphs or a redraw issue (OS bound and not exactly LabVIEW issue). I haven't seen it myself though. Is it possible to replicate the issue with a smaller VI and an array constant for the values? If so then that would be really helpful to post so we can debug.
Here (attached) is a VI I created to try and find the bug but was unable to. This doesn't mean that this issue is only on your machine but just means that we need to dig a little deeper to figure out what causes it. I created it in LabVIEW 2012 but saved this back to 8.0 so you could take a look at it.
Grant H.
National Instruments
LabVIEW Product Marketing Manager
Attachments:
XYGraph_Zoom_test.vi ‏10 KB

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