I just open de designer with a recent project, play a few seconds with some views/clicks, then I switch to browser, and after a minute coming back to the designer I see the hand cursor and the click is dead, also the hover/selection effect - impossible to work, needs a restart. That's all what I can give you. Even the quit designer's cmd from menu doesn't work have to kill the process from task manager.
Upgraded, the same behavior, tried to export a new project made in 276, but the export freezes the designer and the .xda file increases in size with every second, huge size, forced to quit the designer when .xda had 630 MB. Very strange, am I the only one with such problems ?
My steps for the new project:
1. Create new project extjs 4.
2. Added a viewport and a tabpanel to it.
3. Save and export.
Also after first try/step 3, force quit, restart, added extjs link to sources in project settings, but the same behavior.