Preferences -> Edit -> Always hide the error log
If you set the option the edit area for the code remain the same, with an inaccessible grey strip where the error log was.
This, paired with this -> http://www.purebasic.fr/english/viewtop ... 24&t=54870 (you cannot automatically hide the tool panel) waste a big percentage of the screen, something precious especially on a notebook.
See sshot.

OSX 10.8.5
EDIT: causing in some way a resize of the area, for example passing the IDE in fullscreen and then back, or maximizing the window with "+", remove the grey strip and all the edit area is accessible. This until you quit and then relaunch the IDE. At least this suggest it should be easy to fix the problem.




