I've found a PC with Chrome not yet updated, and so have checked the extension popup:
With 4.0.249.25 it worked fine, after updating to 4.0.266.0, the issue occurs. -- You received this message because you are subscribed to the Google Groups "Chromium-extensions" group. To post to this group, send email to chromium-extensi...@googlegroups.com. To unsubscribe from this group, send email to chromium-extensions+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/chromium-extensions?hl=en.