I observed more about this problem today.
It is still 100% repeatable on computer #1, but I noticed that it does occur not on computer #2 ! Both running same version of Firefox, same version of Windows, etc.
In other words, on computer #1, using firefox 29.0.1, those top six text boxes in the "loss estimates" column never get focus, and I can't type in them.
On computer #2, using same firefox 29.0.1, on same web site, all the text boxes work fine.
I thought maybe I had a plugin that was causing some trouble, so I restarted firefox in safe mode. No change!
I thought perhaps my firefox profile was corrupted, so I created a 2nd one. Starting firefox with the 2nd profile same problem.
Before y'all say this is obviously a local problem, because it happens on one computer and not another, note that this only occurs on the nickelsteamroller.com web site and no other, so that idea is symmetrical.
Is there anything different about the first 6 text boxes in that column that could possibly explain this?
Anyone ever see such a problem?