Unstable Pen Pressure only on Photoshop Windows 8

Hi,

Photoshop CS4 CS5 or CS6 is the only program that is unstable with pen pressure sensitivity, all the other programs work flawlessly (zbrush, art rage, sketchbook, painter, mypaint, etc).

In Photoshop if the stroke is fast enough it will draw the line normally and with pressure, but if the line is drawn slowly it will make 100% pressure just like a mouse behaves.

Here's an example of brush strokes, the black ones are the slow strokes that don't register pressure sensitivity.

This topic has been covered in these 3 posts "Wacom Intuos4 + PS CS4 Pressure problem", ""Pressure Sensitivity Problem with Wacom Bamboo Pen Tablet in Windows 7" and "CS4 32bit & Wacom Intuos 3 - Intermittent Pressure Sensitivity"

The evident solution for Windows 7 is disabling the "Press and Hold" feature on "Pen and Touch" settings, But in Windows 8 disabling this check only makes Photoshop unresponsive to pressure to the extreme that not even a single stroke can be drawn. Only random dots with no direction or pressure sensitivity. This is a big no no.

My computer is a Motion LE 1700 tablet that works with Wacom Tablet PC Drivers, there's only a single driver released for Windows 8 which is ISD_DualTouch_710-8.

Older Windows 7 drivers for Wacom Tablet PC don't recognize the pen. And default drivers from the Motion Computing website don't work with Photoshop.

An in all, the 8 ISD_DualTouch_710-8 driver works flawlessly with all my apps with the exception of Photoshop, causing the weird intermitent sensitivity behaviour.

Thanks!