Duplicated "Saving..." messages when adding HS taxonomy items to dropbox

Hi everyone,

I have a weird, albeit minor issue that I can't figure out. I have a pretty complex Drupal 6.26 implementation with lots of modules, including HS 6.x-3.8. I have a CCK content type for user profiles, where I have several profile fields that are using the HS widget with Taxonomy-based values to choose from. HS's dropbox feature is enabled.

The issue is that when you select a value to add to the dropbox and click the "Add" button, sometimes multiple (up to 6) instances of the "Saving..." message appears. Of course, there should only be one. I've attached a screenshot (pardon its faintness).

This is a hard one to reproduce (in fact, I did not believe my client when they reported it to me). I seem to have the best luck in Chrome, while bouncing between two or three different fields, adding values to dropboxes. It can take 5-8 adds before the problem begins to appear.

Since I'm under quite a bit of pressure to get this project live very soon, I am not expecting a fix to this bug before we go live, and so I'm also hoping for stop-gap measures I can take to keep the client happy in the meantime. I've tried CSS, using :first-child to hide all but the first p.hide_submit (which contains the "Saving..." message), and I've also tried jQuery but that hasn't been successful either.

Let me know if you need any further detail or information. Any help is appreciated!