I filed a bug report now for the ogg-support problems. Let's see where that goes.
We'll also start a contest soon to create new speaker files in various languages. I'll announce that in the next days. I hope to get some nice contributions this way such that we can ship a default voice navigation speaker with 1.2.

Also asked our designers to help out with better icons. Possibly this won't make it until 1.2 though, they're quite busy.

Thanks for the testing btw. Git master already contains some fixes for the issues mentioned above.