Hi Mariano,
First off, I really like Mural. I use it on everyday - from brain-dump, to making Information Architecture, to strategy planning, everything over last couple of weeks. So far, i am hooked to it.
But i am facing few issues
1. When i am typing text and as i do some typo error, i press delete on my keyboard to correct it. But there is some error and due to which, my pointer will change, or some random text will be deleted, etc
2. How can i expand the size of the canvas when need
3. Why it takes so much time to export the board into PDF.
PS: i am using chrome browser