If optional LevelFiles (+file.lvz) are used and the user deselects "Use optional graphics/sounds", LevelFiles behavior goes nuts. User downloads sum over 100% and users will redownload something every time they enter the arena. Required LVZs may not show up as well under this bug.
Already tested this and confirmed that it exists before the recent LevelFiles extension. Need to still confirm it existed in 1.4.4.