Hi Fuzzy,
Thanks for helping to bring this to our attention. Unfortunately our description editor does not support the display of these characters so it is not possible to use them when creating your listings through Auctiva. We are aware of this issue but I am uncertain whether we will be able to resolve it with a future update at this points.
We apologize for any inconveniences this issue may be causing you. If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the "Help" tab and selecting the "File Support Case" option.
-Mike