I'm running into an issue where everytime I do a clean/build in Juno on my SY project, when it gets to the validation of the sy xml, it just stalls forever. I made sure that the validation was turned off in the XML preferences of Juno. This is for sy 1.1.0 final.
Tough to say why/where this is occurring, but I haven't seen this in my environment. If there's a series of steps that can be used to reproduce this in a clean install, then please let us know. You might want to consider updating to Kepler, which is the target version of the tooling for 1.1.