The current recently-used pipe menus for Openbox don’t work. I don’t think they have for some time. The newer format (~./recently-used.xbel) is used by nearly everything except seemingly my version of Open Office which uses the older format and the ~./recently-used file.

The newer one is here:

http://icculus.org/openbox/index.php/Openbox:Pipemenus:recentfilesxbel

It only shows the last 15 files used, and should mirror the Gnome recently used file list.

thanks to Mikael Magnusson for the usual sed help