I have a site under development which uses WP Splash Image along with the Slideshow Gallery plugin. All worked fine until I updated WP Splash image last night, which caused the slideshow to stop working (it won't load the images). I don't know if this has something to do with the recent changes you made to include JQuery. When I deactive WP Splash Image the slider works just fine.
I am using a child theme to twenty eleven with relatively minor tweaks to the CSS, WP Maintenance Mode plugin, MailChimp, and JetPack.