"There was an error starting Zotero"
I'm not sure when this started, but I just noticed that Zotero is missing from my browser. It is however, listed under "Tools", but when I click on it, I get the message "There was an error starting Zotero". It is also listed as one of my add-ons under extensions. Should I just re-download it?
If that fails: http://www.zotero.org/support/reporting_bugs#reporting_startup_errors