2014 Adjusting Aperture Size

Just wondering if anyone can confirm this bug or if it is in fact a bug?

The aperture size cannot be modified using the sider under options. Workaround seems to be to use the system variable “pickbox”. Occasionally it seems to also display as a rectangle instead of a square, obvious when variable is set below 10 (however, this seems to be one of those intermittent problems / might be a stand-alone graphics problem).

I've got SP1 installed.

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