I am trying to use w3-total-cache plugin on multi-site sub-folder setup. I am using a switch_to_blog() function to show featured posts from different blogs on the main blog front page of my site. When I enable w3 total cache on my site all the sub folder sites work properly but image from the featured post from different sub folder site which were being shown on the front page of the main site disappear. I did view source and found that incorrect URL is being created for the images from sub-folder sites. For some reason w3-total-cache is not able to detect that images belong to sub-folder sites and are just being shown on the main site using switch_to_blog() function. URL for images which is being created by w3-total-cache plug-in is trying to fetch images from image folder of the main site (i.e. wp-content/upload...) while images are present in the image directory of the sub-folder site.
Please let me know if there is a way to fix this problem. I am not able to use this excellent plugi-n just because of this problem.