Well, I've found a "solution" to my problem: I removed PCLinuxOS with KDE and installed PCLinuxOS "Phoenix Edition" (with Xfce desktop).
On other computers I own, I use variants of that "famous" Linux distribution (you know - the one that begins with U and ends with u).
I do not like the Unity desktop (though I'll admit that it is much better in the current version than it was in the previous one). I tried the KDE variant of that OS but I found that I did not like it either (it crashed all the time). Plus I could not customize the desktop the way I wanted.
So I tried the version which begins with X and ends with u: this version, using the Xfce desktop, is, in my opinion, almost ideal. I can configure the desktop any way I like with no restrictions.
Using the Xfce desktop with PCLinuxOS, I can do the same. With KDE in PCLinuxOS, though there are a myriad of configuration options, I could not get it exactly the way I wanted it. No such problem with Xfce. (And I like Thunar better than Dolphin. Just my opinion, of course.)
Mostly KDE seemed to crash in PCLinuxOS was when I ran both BleachBits. Someone asked why I would want to do that. Maybe I'm paranoid, but I want to do that just before I shut the computer down. I like to have a "clean" computer on start-up. But KDE also crashed (just once or twice) for no apparent reason (but it crashed much less frequently than it had when I used K-----u).
With the Xfce desktop ("Phoenix Edition"), I can run the BleachBits and there is no crash. As a matter of fact, in the three days I've been running this variant, I have had no crashes whatsoever, regardless of what I do.
I am slowly learning how to use PCLinusOS. I am getting to like it better than that "other" distro primarily for two reasons: (1) I need to have only one repository active (rather than the 16! repositories I need in the "other" distro) and (2) it is a "rolling release" so there is none of the "upgrading" every six months (which mostly works but sometimes doesn't).
So far, I have been able to use each and every Linux program (and one Windows program, under Wine) on PCLinuxOS that I use on that other distro.
I'm going to experiment further. I recommend the "Phoenix Edition" (with its superb Thunar file manager) and, especially, the Xfce desktop (which I regard as superior even to Gnome 2.32) wholeheartedly.