[Brushes aren't working...anyone else?]

Thank you MEB, I've tried your suggestion and even made sure my Pen tablet was up to date but, I am still I'm getting the same results

[Brushes aren't working...anyone else?]

Thank you for your response but I am still experiencing the same issue. I did have the brushes set to pressure but the "controller" on the top bar was set to none so I changed it to pressure, but there is no change in the stroke lines. 

[Brushes aren't working...anyone else?]

I'm having the same issue. While using either my Wacom Stylus Pen or even my iMac mouse! I can see the edited brush as well as any custom brushes, but when I try to use them, they all draw the same...as a basic solid brush! Please help!  I've attached a screenshot