Openbox Configuration Manager - Windows title font

[Pierre Gobin]

Hi,

I met an annoying bug since a long time with Openbox Configuration 
Manager on Lubuntu. Indeed, if I try to modify windows title font from 
Ubuntu Medium to another, then return to Ubuntu Medium, I do not find 
the original aspect. Moreover, if I try to use Ubuntu Bold, Openbox 
Configuration Manager stay with Ubuntu Medium.

So my question is to know if someone else can confirm these bugs. Also, 
I would like to know which is the original font used in Lubuntu, in 
order to find the original aspect again.

If my problem is not clear enough, I may be able to make a screeenshot.

Thanks,
Pierre Gobin