Program don't let me cut faces.

Support Modeling
1

I tried to cut the top of the cylinder into quads but whenever I try to cut it with K it does nothing. At the first few cuts its okay but sometimes it just does nothing and stop without giving any errors that i can’t cut here or something.
http://postimage.org/image/jycnsxfk7/

2

It would be more convenient just select 2 vertices and use J key in this case.

3

I did that but I find this very strange and want to know why the program does this.

4

There have been some fixes regarding the knife sometime not cutting faces since the old 2.65a release.

Try a more recent version of Blender (like the Blender 2.66 release candidate) to see if you observe the same problem

Note : the “stable” Blender 2.66 release should actually happen tomorrow.

5

Oh, okay thanks!