Hi,
I read that greasemonkey higher than 0.98 should update scripts automatically but that never happens. I always have to update them manually. I checked "preference" and there is no option to enable updating script automatically like the screenshot posted on your website. All I have under greasemonkey options are Editor, Uninstall and under "Update checking" there is only a single checkbox that says "Require secure updates" (the options "Enable automatic update checking for scripts" and "Automatically install updates when found" in this screenshot are missing from my installation
http://www.greasespot.net/2012/02/automatic-script-updates-come-to.html) I tried checking and uncheckingthe "Require secure updates" box which makes no difference.
I am using greasemonkey 1.4 on Firefox 16.0.2 (but I have experienced this for all previous FF versions). OS is Ubuntu 12.04.
Thanks in advance for advices and hints.