Standing Trade Window Freeze

[Hjalmthrimul]

When attempting to trade gems for Ostron standing, if I start typing a line in chat, then before pressing enter click in a quantity box and start editing the quantity of gems to trade, the trade window stops accepting all input.  I can still type in quantity boxes, but scrolling and all clicks outside the quantity boxes don't register.  Chat continues to work fine.  Window cannot be closed, and no other menus can be opened, the only way to exit is alt-F4.

This bug is repeatable.  I suspect it works with other syndicate trades, but haven't tried yet.