Hi Zamy, Check the settings for signatures in Outlook, were these setup as blank and did you type the signature in or did you create from an existing file. Also have your settings changed recently from word as the email editor or have you changed from HTML to RTF or Text file. I would go through the options in tools, options, and play around with the formats, maybe create a new signature or copy and paste the old one.
If Word is set as the email editor then the option to check the signature will probably come from Word rather than Outlook. Try not using word as the email editor then put it back on and check further. Also if you do a quick google you will find lots of suggestions on how to resolve this problem and what to check as well ;-)
