**System Information**
Ubuntu 14.10 - Intel® Core™ i7-3930K CPU @ 3.20GHz × 12 - GeForce GT 740/PCIe/SSE2
**Blender Version**
Broken: hash: 23af898
Worked: Official Release 2.73a
**Short description of error**
OBJ importer not working. The "NGons" check box option is missing and can't import .obj models.
Here is an example file, just try to import it and you'll see the error message:
https://www.dropbox.com/s/64te5ikmh91g9df/Esteira_Otimizada.obj?dl=0