I downloaded a few days ago the Virtual Photographer Plugin.
I must say that I find it very useful indeed as it speeds up the process of applying specific effects.
Though I get the same problem with a few of the included presets.
The problem, is intense image blockiness mostly visible on uniform areas, like skies, of walls and generally where there is a uniformity of color when specific presets are used at the default settings.
The problem occurs only in B&W Plugin Section and when presets are used at default settings and is mostly and clearly visible when image is viewed at full size.
Presets: Anvil, Character, Dramatic, Fashion Shoebox, Spooky and Still Life.
Has anybody noticed the same the problem? If not can you tested yourselves and post your findings?
Here is an example of "Before-After"