Comment form in Single Post spills into sidebar

Not without a link.

Yes a link would help. Here it is:

https://canadianenergyissues.com/2008/05/23/get-ready-for-another-energy-price-hike-ontario-fiddles-while-gas-burns/#more-288

The footer text I put into single.php starts with “Canadian Energy Issues is written and published… etc.”.

Well, that page shouldn’t be using the class “widecolumn” if there’s a sidebar present. So change that div to “content” and it should be fine.

A quick fix is to just add this to your stylesheet:
textarea { width: 85%; }

Thanks jonimueller, the textarea quick fix seems to have made the comment form behave properly.