On http://wiki.archlinux.org , now input field shows up in the search box.
The 'Search' title, and the '[Go]' and '[Search]' buttons are there, but there is no way to input the search terms.
This happens with both 0.5.2 and the latest cvs version (1283 it seems, even tough '-version' says 0.5.2+cvs-1.1038).
It works in both lynx & links, so it's unlikely to be caused by javascript or other stuff that only firefox-class browsers can understand.
s/now input field shows up/*no* input field shows up/
Fixed in Debian w3m 0.5.3-8 (110_form-input-text.patch).
The patched snapshot can be downloaded from:
http://anonscm.debian.org/gitweb/?p=collab-maint/w3m.git