AutoComplete onfocus behavior only working on last autocomplete field

This is basically the same bug as WICKET-2158. That one was closed with this message by Gerolf:
"resolving this issue as fixed, as of revision 791516 (before the 1.4.0 release) committed by jcompagner ("forgotton declaration of var objonfocus;") "

However, we are still seeing this problem with 1.4.10. Some searching in the logs reveals that revision 886735 by jcompagner ("fixes and improvements (browser issues)") removed that line again, presumably accidentally. Could we please have that back?