When configuring Hammer, it seems best to not set the default SolidEntity class to: worldspawn. Reason being - when you go to create a brush entity, you cannot change the class(I do not believe one wants a 'worldspawn' everytime they attempt to create a brush entity). I don't, currently, know the technicalities that prevent this; but, it is very frustrating and could inhibit someone just starting to learn goldsource map-editing in Hammer(most importantly, working with brush entities).
There may be other entities classes that cause this, if set as default in the 'Game Configurations' tab under tools>options.
P.S. There isn't any other instance on the web, that I could find, mentioning this.
Thank you for your input, MuzzleFlash.
Edit: Oh, wait, I get what you're saying better now. But does hammer by default have that as the solid entity setting? Because I never changed it myself. But yeah, the worldspawn entity is that one that I only ever accessed by going up into the map properties or some crap like that. I don't remember it appearing within my entity list any time. Maybe you've got a different FGD than the standard one I was using.
I put this up for trouble-shooting purposes, in the hopes it will someday be useful to someone that is encountering such a problem.
I am using the FGDs that came with the v3.4 distribution.
Hello.