>>Maybe use "Display: none", to hide the div - using "visibility: hidden" hides the div but the space used by the div is still in the same place & size, setting display to none make the div take up no space at all.
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>It has to be the visibility tag for the DIV to frame itself. However, it turned out that this was reflected by the error on page 2. For some kind of reason, that error was making the DIV to act extremely weird. After that, I wasn't able to simulate that cursor behavior when clicking on several spots in the reply TEXTAREA region.
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>Can someone let me know if you still have that cursor behavior on a few messages?

I don't see it anymore. I think it has been fixed.