Column/Row numbers?

[John Coppens <john jcoppens com>]

Hi all.

Suddenly, all column and row numbers were replaced by their hex codes
(the little squares with 4 hex digits in them). The codes are correct -
0041, 0042 etc.

All the rest of the window is correct - menus, dialogs, worksheet content.

Version is 1.6.3, and the problem appear even when called without any
spreadsheet loaded (empty).

Help!
John