It was in UTF-8. Part of the problem seems to be GNU Screen-- if I switch tabs, then switch back, the redraw seems to clobber some formatting characters. EDIT

It was in UTF-8. Part of the problem seems to be GNU Screen-- if I switch tabs, then switch back, the redraw seems to clobber some formatting characters. EDIT: LC_CTYPE wasn't set for that user, but setting it didn't fix anything. So, who knows.