No description provided.
Garux, the title is vague and you have no description. Do you really expect anyone else to know what you mean by this?
You might want to read this:
Well, the title contains pretty full data about issue in compact format .)
-run radiant in brush primitives mode
-copy it (space/ctrl+c-ctrl+v)
-get 'current map format is incompatible' - 'convert/change default/abort load' popup
GtkRadiant-1.6-20120917 and older.