Testing the java client on Opal.
Reads the shop names.
With a small patch it compresses the stall types.
But submits 0/0 buy/sell offers.
The server accepts this as "no one is buying or selling" and drops the perfectly good data submitted by other clients (v5 client)
Maybe related to the YARRG client updates, too.
Suggested fix: consider an upload invalid if it contains absolutely no offers. (at least until the clients work more reliable)