The throbber.gif file is used by the Ajax javascripting. It is
included in the calendar package at
/plans_8.2.1/theme/images/throbber.gif
The only references are in the stylesheet and the .js file:
plans_8.2.1/theme/plans.css: background-image:url(images/
throbber.gif);
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js: image: jQuery.planscalendar.theme_url + "/
images/throbber.gif",
plans_8.2.1/theme/plans.js:(function($){var
defaultOptions={ajax:true,delay:
0,image:"throbber.gif",parent:"",wrap:""};$().ajaxStop(function()
{_throbberHide($
(".throbber_ajax"));});_throbberShow=function(options,jelement){var
jparent;if(options.parent){jelement=null;jparent=$(options.parent);}
else{jparent=(jelement?jelement.parent():$("body"));}
Not sure why it is being called as being in your cgi-bin directory.
Check you configuration, or revert to a default installation.
I can't troubleshoot mroe as I use an earlier version without the Ajax
beauty, as it was screwing up Chinese editing.
Good luck!
-Edward
p.s. Consider posting a link to the actual installation, as that might
draw out someone more knowledgeable.