TLDR; Slider breaks in Chrome when child theme is active due to NETEYE Activity Indicator jQuery Plugin's use of document.styleSheets[1].insertRule(rule) which triggers an error because the stylesheet begins with @import.

This can be fixed by replacing:

document.styleSheets[0].insertRule(rule);

with

document.styleSheets[0].insertRule(rule, document.styleSheets[0].cssRules.length);

on line 150 of the (unminified) Activity Indicator plugin (So, one would have to remove the minified Activity indicator, and replace it with the unmodified, then patched version).

Deets
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The home page slider used to be fine, but then one day I noticed that it stopped working in Google Chrome (still works in other browsers). I checked the JS console and noticed that a the following error is logged: "Uncaught Error: HIERARCHY_REQUEST_ERR: DOM Exception 3"

After a bit of troubleshooting, I determined that the issue only occurs when a child theme is active. Even the simplest child theme without any changes will cause the problem to occur. For example, this minimal child theme style would trigger it:

///////////////////////////////////////////////////////
/*
Theme Name: WPAID Child Test
Theme URI: http://www.awethuproject.co.za/
Description: Child theme for the WP Aid theme
Author: Go Media
Author URI: http://gomedia.us
Template: wpaid
Version: 1.0
*/

@import url("../wpaid/style.css");
///////////////////////////////////////////////////////

Heading on down the rabbit hole, I then determined that the error was being generated by the NETEYE Activity Indicator jQuery Plugin that's included in the wpaid/scripts/scripts.js file.

I commented out the minified Activity Indicator plugin, and grabbed the unminified version (which hasn't been updated btw) from https://github.com/neteye/jquery-plugins/blob/master/activity-indicator/activity-indicator.js

The code that's triggering the error is on line 150 (from the link above):
document.styleSheets[0].insertRule(rule);

This seems to be happening because Chrome doesn't like it when you insert a rule before the @import/@charset rules, as discussed here:
http://code.google.com/p/chromium/issues/detail?id=135524
(fix) https://github.com/neteye/jquery-plugins/pull/47

This is understandable, since the @import rules are supposed to come before any other rules, but it presents a problem because child themes will inherently begin with the @import rule.

I have applied the fix, and it's working, but I'm hoping that you might update the theme with the patched JS.

Chrome 21.0.1180.60 m
WP 3.4.1
WP Aid 1.1.1 (Unmodified)
(Child theme stylesheet above)