Blender 2.64 / Ubuntu 12.04 / NVIDIA FX3700M

In VSE : group any stripes into a metastrip (CTRL+Gkey) -> enter in metastrip (press TABkey) -> select some stripes -> press Gkey -> try to change channel -> impossible. Changing channel in properties panel works but it's not convenient.

Note : in metastripes, the overlap test seems to be skipped.

Bye