I got you Holger, but the intended behavior should be different. That’s all I’m complaining…
Toggling front faces only should only select the viewable faces with Selmask, turning it off (front facing vertices only, keeping global mirror x on) should only select the selected vertices on the x-mirrored side, not the one mirrored by view port (that’s how I have it on my Android, Galaxy Tab 7). Not crucial, but it shouldn’t be that way…
Btw: you might noticed my demand (see: link) for a Tutorial. How to reuse textured base mesh (e.g. faces) to level multiresolution and reproject, according to Stephane’s hints…
You have the audience, people watching you…