im using the latest releases on wordpress multi-site and site-wide-tags which is causing me issues when researching the same problem from 11 months back - the fixes simply don't match the same methods due to upgrades in software and plug-ins...
the issue - i have an mu installation in which i have sub-sites and a main site, i am using the site-wide tags plug-in to pull posts from the sub-sites and display them on the particular page on the main site...
text pulls in perfectly however the featured images do not and subsequently this is effecting my latest posts loader which also cannot pull the images from across site.
i have contacted Pexeto who have helpfully reviewed my issue and described the following diagnosis
"This is a bit weird – I think this may be either related with some installation settings or this may be a WordPress bug. I checked the code generated and the image code is not included, which means that the following code from the widget: (xxxxxx.xxx.xxxx)
returns false. has_post_thumbnail() is a default WordPress function and the problem is that this function returns false when it should return true, so this is why I think it is something related with WordPress, not with the theme.
looking forward to hearing good news ;)