Dear Sebastien,
1) I can confirm this problem and I sent a bug report to the developers for fixing it.
2a) I can see the tags normally, can you send me a screenshot?
2b) Shift+TAB is for un-indenting. You can press TAB and after Shift-TAB to see it working.
3) I see what you mean, I will send this over to the developers too.
Please let me know if you are satisfied with my answer and if I can help you with any other questions you might have.
Regards,
Caridad