Incase anyone else has this problem and stumbles upon my post, it looks like when entering a 'corrupted chunk' text can be scrambled and made unreadable, to solve this walk away from said area and log back on to the server (forgot to mention this happens on multiplayer for me, haven't seen it on SP but I'm only there when practicing flying or messing around).
I have the same Problem and its 2 years later. Before that i had the "bad module info" Error. I updated my Graphic and all Updates for Windows. Now it doesnt crash but i get this Symbols. When i leave the server, all textchars are Symbols too. I need to restart befor its back to normal.