Please accept my apologies for getting your names wrong.

I pasted your code under PS and it doesn't do any different.
CF.widget("COUNTER", "SCRIPTS", "RESOURCES") the label is: 0 (zero), but whatever other value say 3(three) it behaves as stated above.
The label is not empty/null but - isNaN is a clever way to put this kind of error wright - cheers.
However, for the test purpose I deleted the label's value and guess what:
if label is blank it returns:
1-

if it contains a letter say t it returns:
1-t

I would have expected the script to change the panel's label from- blank or t to 0 as per isNaN condition.
I really hope it is some silly error of mine (despite all embarrassment) but I don't know where to look for.
Can I email you the .xcf?
I have just reloaded the firmware on my tsu9600 and no difference.
Firmware version 1.4.28