Post: #2

Found the issue. We released a file patch where some unused graphics were removed from gumpart.mul (things like the old style chest opening animation from really old clients and some of the unused splash screen images) and apparently either the client relied on something that was deleted or it messed with the index or something even though none of the graphics deleted had anything to do with the buy/sell menu nor looked important (i.e. nothing that looked like it might be hitboxes for certain buttons, etc). At any rate, restoring the client's default gumpart.mul (and idx) fixed the issue. Quite strange.