I'm so frustrated.  This thing *almost* works for me but not quite.  I'm running J1.5 and have discovered that the only popup engine that works in BOTH Firefox and Explorer is Slimbox but in Firefox, if you move your cursor off the pop-up window a big box appears over half of the picture.  It goes away if you move your cursor back over the photo but it's really annoying and my boss hates it.  If we cannot fix it I would like a refund and will go try something else.  I've been working on this for days.  Please help!  You can see what I mean here, but only with FIREFOX
www.harvestingjustice.org/index.php/farmworkers-feed-us-all

p.s. I know that would look a zillion times better if the thumbnail were centered but that seems to be impossible.  If you could help me with that too I'd be eternally grateful!!

I think it depends on the mouse behaviour of the navigation. Please check your navigation files:

/mambots/content/plugin_jw_sigpro/BOXTYPE/LANGUAGE/BOYTYPE.css

and search for a yellow color background on mouse hover.

I made a screenshot and measured the color:
#efed5c

If you can't work it out. Zip the folder "/mambots/content/plugin_jw_sigpro" and send me a mail with the folder. I'll try to fix it...

Best regards

Jürgen