W3 Total Cache
Flying Pigs works with W3 Total Cache as long as its database cache leaves logged-in users alone. Uploads run while you are logged in, and a cached database answer can make WordPress miss a file that has just landed.
Check these two Database Cache settings in W3 Total Cache:
| Don't cache queries for logged in users | must be checked |
| DONOTCACHEDB | must be in the "Reject constants" list |
Both are W3 Total Cache's defaults, so most sites need no change.
W3 Total Cache also has a WebP option. If it is on, Flying Pigs' Delivery panel lists it as a plugin that may already be serving WebP, so you can check which one is in charge.