I don't know if anyone else is having this problem but I'm finding the menu system in Aalto is consistently requiring me to click on it twice pretty much every time I want to navigate it - the first time I open it it just poofs on me while navigating it. It's getting to be a bit of a pain that it won't stay open.
This on Mavericks - doesn't matter which host - MacMini (i7)
This is fixed for the next release. I'm working to finish another couple of fixes and get Aalto 1.6 out ASAP.