It turns out the snippet in the post I linked above corrects a related but different issue. Sorry for the confusion. You should be able to add the following CSS snippet to your parent/master page (i.e. one level above any page includes) to push the Page Include ‘back’ behind the drop-downs and other areas that are supposed to be ‘in front’ of the rest of the page contents. If using this, be sure to test all pages well for any unintended side-effects.
.nx-include-panel{ z-index: 0;<br>}
This also only appears to be an issue when the standard Salesforce header is being displayed. Our dev team is aware of this issue, and we will be working on addressing it in an upcoming release. The workaround here should be removed once you update to the Skuid release with the fix (and always be sure to update out of date themes).
