I can't think of any place to set that, except... I noticed you have the add-on ChromEdit Plus listed in your "More system details" info. If you check that extension, does it mention anything about the number of items on a menu (e.g., max-height or similar rule)?

As far as I know (and I'm a relative newbie) chromedit plus isn't like when you type "about:config" in the browser bar and you get this list of options that you can toggle on or off. You have to know a sequence that you want to type into your profile, which then causes changes. I only have it because when I'm googling questions about firefox, occasionally an answer will say to cut-and-past this into your chromedit profile, which i can do because i have add on.

Do you know if there is a way to set my profile so that I get an email when someone (like you) replies to my post? right now, i am just coming back occasionally to see if there are responses.

Thank you for your help!

I don't know how notifications work on this forum. (I'm not getting any.)

If you have added new rules in the past, then take a look at your userChrome.css file. It is in your Firefox profile folder which is roughly here:

C:\Documents and Settings\windowsusername\Application Data\Mozilla\Firefox\Profiles\profilename\chrome

If you like, you can paste the rules here for review. If anything looks too personal, delete that from your text before hitting Post Reply.

Here's what I have. Thanks!

#urlbar-icons > #star-button
{
display:   none !important;
}

/*Remove magnifying glass button from search box*/
.search-go-button-stack { display: none !important; } 

/* Eliminate the throbber and its annoying movement: */
#throbber-box { display: none !important; }



/*
 * Edit this file and copy it as userChrome.css into your
 * profile-directory/chrome/
 */

/*
 * This file can be used to customize the look of Mozilla's user interface
 * You should consider using !important on rules which you want to
 * override default settings.
 */

/*
 * Do not remove the @namespace line -- it's required for correct functioning
 */
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */


/*
 * Some possible accessibility enhancements:
 */
/*
 * Make all the default font sizes 20 pt:
 *
 * * {
 *   font-size: 20pt !important
 * }
 */
/*
 * Make menu items in particular 15 pt instead of the default size:
 *
 * menupopup > * {
 *   font-size: 15pt !important
 * }
 */
/*
 * Give the Location (URL) Bar a fixed-width font
 *
 * #urlbar {
 *    font-family: monospace !important;
 * }
 */

/*
 * For more examples see http://www.mozilla.org/unix/customizing.html
 */

You need to place the @namespace line at the top of userChrome.css before any rules.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */

#urlbar-icons > #star-button
{
display:   none !important;
}

/* Eliminate the throbber and its annoying movement: */
#throbber-box { display: none !important; }

There aren't any rules related to autorepeatbuttons.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Thank you! I have changed this in my userChrome profile, but it has not helped the problem.