What is the purpose of "position: relative" in zen-grid-container?

[JohnAlbin]

The position: relative that is in zen-grid-container() is just CSS I copied over from the original Zen Columns layout technique I've been using for 6+ years (a technique I developed). I think it was needed for some cross-browser compatibility, but I didn't document it, so I'm uncertain what its purpose is and if it's still needed.

[JohnAlbin]

I've tried researching this, but the code comes before I ever used a version control. The very first commit of the Zen theme that contains this layout method already has this line of CSS in it. It's not documented there either.

I'm going to punt on this. I suspect it is some obscure IE6 layout bug. There were lots of those! But I don't want to set up tests to try to figure it out.

Rather than just remove it, I'm going to move it to the IE6/7-only styles and add a note.

[gmclelland]

Perhaps it helps solve these IE bugs?
http://www.positioniseverything.net/explorer/peekaboo.html
http://jonathanstegall.com/2009/01/15/ie-z-index-bug-with-css-dropdown-menu/