Screenshot
Steps to reproduce:
1.Go to Insert>Template
Observed Result:
Observe that, in the header of the dialog box , instead of text "Transclusion" ,"Null" is appearing
See the screenshot attached
Test Environment: http://en.wikipedia.beta.wmflabs.org/
Browser: Chrome Version 26.0.1410.65
OS: MAC OS X 10. 8. 5
Version: unspecified
Severity: normal
Attached: