In gtk+-1.2.10-r11.ebuild there are the following ewarn's: ewarn "Older versions added /etc/X11/gtk/gtkrc which changed settings for" ewarn "all themes it seems. Please remove it manually as it will not due" ewarn "to /env protection." Those are printed always. IMO, it would be better, if that message were only printed when /etc/X11/gtk/gtkrc is found. Attaching a new ebuild and a diff which does that.
*** This bug has been marked as a duplicate of 141253 ***
Created attachment 92381 [details, diff] Patch against gtk+-1.2.10-r11.ebuild