Thanks for responding Roblan, I actually ran across your thread a few days ago but after reading it, I’m not sure if your fix will help me out.
I can get the custom files to upload if I click on the custom file button, the problem I have is allowing W3TC auto uploading any new files.
Since I already have about 100 galleries in my wp-content/gallery location, having to upload them all over again with each new gallery wouldn’t be a viable option.
When using your solution, does your custom file list auto upload?
Also, I made sure that the wp-content/gallery/* was added into the custom files list but still no go.
Can anyone help me with this issue?