Keep Password in KDE su

[James Philipson]

Running KDE 3.2 on Suse 9.1 as a normal user.  When I go to perform a 
power function I get a Window that prompts for Root's password so Yast 
can start.  That is all well and good.  Question:  What happens, and 
what are the dangers, when you check "Keep Password"?  How is the 
password stored and could this later be used as a hole by some malware?

I've read this - 
http://docs.kde.org/en/3.2/kdebase/kdesu/sec-password-keeping.html but 
want to read some real world debate on the subject.

Thanks in advance.

JP