When I try to post a comment the page greys out but nothing else happens, and the comment is never posted.

When I try to post a comment the page greys out. Clicking again restores the page, but the comment is unposted. Repeated clicking "Post comment" just repeats the greying out and restoring. I'm using 14.0.1 on win7 (64).

Is this on one particular site? When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.
1. Clear Firefox's Cache
orange Firefox button ''or'' Tools menu > Options > Advanced
On the Network mini-tab > Offline Storage : "Clear Now"
2. If needed, delete the site's cookies here (if you usually stay logged in to the site, this probably will log you out)
While viewing a page on the site, right-click and choose View Page Info > Security > "View Cookies"
Then try reloading the page.
If that doesn't help, perhaps something in Firefox 14 or one of your add-ons is not compatible with the site. Do you want to post the URL?

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