I get a network error when trying to save projects after which point save (or save and close) no longer works and I have to discard my changes and start again.
However the rest of the IDE still seems to work at this point.
This happens with more than one project and also if I log on with a different computer.
Saving will work occasionally (say 1 in 5 times)
A couple of days ago I have no problems at all.
My network connection seems fine - speed and ping tests are normal and I can access the Tiggr (and other) sites without any problems.