Thank you, Texstar - your instructions indeed did solve the problem. I did not delete all of the keybindings though - only the top and both side bindings, instead. I left the bottom binding in place, as I was concerned there may not have been any way to return the taskbar shelf from hiding, otherwise.
I believe you have issued these instructions to me once previously; however, I became sidetracked in attempting to grapple with the KDE4 issues, and by the time I returned to e17 I found I was no longer able to locate your previous posting. I realise that you must certainly be especially busy with the coming KDE 4.4 integration, as well as of course the 2010 release - and I do as surely extend my gratitude for your kind assistance. Please rest assured that it was not in vain, for having experienced the difficulties and problems associated with KDE4 so far, I realised it would likely be better to have an alternative window manager at the ready - just in case KDE4 should suffer any further unforeseen issues.
Enlightenment seems to me a very different and complex environment; not as complete nor quite as versatile as KDE4, but truly having its own advantages nevertheless. (as an example: I have just watched a British television video, full-screened, and displaying acceptably-smooth playback - with the CPU speed manually set, to only 337MHz.)
I shall endeavour to learn more of it.