Okay, so Mac IE 5.0 is a useless dinosaur, on its way out, who cares about its sorry hide, etc. But since I'm having more fun playing with WordPress than doing any actual writing, this has become a an all-consuming mystery.
Here is Dixiebelle in Safari, The Way God Meant It To Be. Note the tulip in the right-hand side, as seen through the translucent sidebar. Lovely.
Here is my site in Mac Internet Explorer 5.0. No tulip.
Here is GeeksMakeMeHot's site in Mac IE 5.0. No tulip, there, either. I went through her links to people using Dixiebelle and none of them has a working translucent sidebar in Mac I.E. 5.0--they look like this... and this... no translucent sidebar...
...EXCEPT for Liz Cu's site. Liz's site is special. The internet gods have looked down upon Liz Cu, yea, verily, and decided only she is worthy of a translucent sidebar in Mac I.E. 5.0.
Liz Cu's internet guy tells me he just downloaded Dixiebelle and didn't need to change a thing because it worked perfectly right out of the box.
GeeksMakeMeHot spent some time on it this weekend (thanks, Jennifer!) and says she is stumped and perhaps I should bring the problem to the support forums, which I just did.
Now I'm going to ask the Lord to grant me the serenity to accept the things I cannot change, etc. Like my permalinks problem.