Steps to reproduce:
1.Open a page with VE which contains an image
2.Open the media settings for the image
3.Go to the advanced settings page
4.Now switch the browser tab or window and then again switch back
Observed Result:
The tab in Media Settings got switched to General Settings from Advanced Settings.
Test Environment: http://en.wikipedia.beta.wmflabs.org/
Browser: Chrome Version 26.0.1410.65 & FF 25
OS: MAC OS X 10. 8. 5
Version: unspecified
Severity: normal