This filter only has one slider "radius". In version 7 this filter had three - amount, radius and threshold. Have these features been assigned to another filter? Having only the radius slider available is a loss in control over the filter. I also created actions around the way version 7 worked...Ugh.
#1
Uh. . .no. Gausian Blur has been a single radius slider since, oh, Photoshop 1. Amount, radius 7 threshold is descriptive of USM. . .is that what you are thinking of? Kinda the opposite of G blur. Or, were you thinking of Smart Blur? That has radius & threshold and is the same in 7 & CS.
#2
Opps! I see that everything is in proper order. I was thinking of the "unsharp mask" which is still functioning as it did in version 7.
#3