The link you posted indicates that problem was solved.
The problem you are experiencing is because you can't use the CDN for custom themes you make with theme roller, the CDN only has the standard themes. your url has "jquery_custom" as the theme name but that is not a standard theme name.
If you want to use a custom jqueryui theme then you have to host the files locally. Otherwise only use a standard theme name on ScriptLoader in layout.master.
<%-- JQueryUIThemeName valid options are:
base, black-tie, blitzer, cupertino, dark-hive, dot-luv, eggplant, excite-bike, flick, hot-sneaks,
humanity, le-frog, mint-choc, overcast, pepper-grinder,
redmond, smoothness, south-street, start, sunny, swanky-purse, trontastic, ui-darkness, ui-lightness, vader
<portal:StyleSheetCombiner ID="StyleSheetCombiner" runat="server" JQueryUIThemeName="hot-sneaks" />
Hope that helps,