Hi I am pretty sure, this must have been discussed before, but again, I cannot find a hint/reference in the e-mail archive: If I install a new galaxy server using the "June 23, 2011" release (changeset: 5743:720455407d1c), I cannot save a visualization after adding a new track: I get a little pop-up window saying "Could not save visualization", if I click on 'ok' it pretends to start saving, but the web browser freezes. and I get the following error: URL: http://silicon.fmi.ch:8097/tracks/save File '/galaxy/galaxy_test/galaxy_dist/eggs/WebError-0.8a-py2.5.egg/weberror/evalexception/middleware.py', line 364 in respond app_iter = self.application(environ, detect_start_response) File '/galaxy/galaxy_test/galaxy_dist/eggs/Paste-1.6-py2.5.egg/paste/debug/prints.py', line 98 in __call__ environ, self.app) File '/galaxy/galaxy_test/galaxy_dist/eggs/Paste-1.6-py2.5.egg/paste/wsgilib.py', line 539 in intercept_output app_iter = application(environ, replacement_start_response) File '/galaxy/galaxy_test/galaxy_dist/eggs/Paste-1.6-py2.5.egg/paste/recursive.py', line 80 in __call__ return self.application(environ, start_response) File '/galaxy/galaxy_test/galaxy_dist/eggs/Paste-1.6-py2.5.egg/paste/httpexceptions.py', line 632 in __call__ return self.application(environ, start_response) File '/galaxy/galaxy_test/galaxy_dist/lib/galaxy/web/framework/base.py', line 145 in __call__ body = method( trans, **kwargs ) File '/galaxy/galaxy_test/galaxy_dist/lib/galaxy/web/framework/__init__.py', line 65 in decorator return simplejson.dumps( func( self, trans, *args, **kwargs ) ) File '/galaxy/galaxy_test/galaxy_dist/lib/galaxy/web/controllers/tracks.py', line 580 in save "track_type": track['track_type'], KeyError: 'track_type' Is this a 'bug' in the "June 23, 2011" release ? By looking through the commits on galaxy central i found the 'changeset: 5750:b13d16085dfc' from Jun 27: "Add generic method for getting track type and use it when saving visualizations." I am now using the two 'fixed' files: ~/static/scripts/trackster.js ~/templates/tracks/browser.mako and it now seems to work, ie I can save the changed visualization. Was this the right fix? Thank you very much for your help Regards, Hans