Discussions on the internet imply some complications, yeah! Our intranet-system at work is designed to make you start a discussion and not being able to edit any of the comments. And more than once I see here postings crossing each other while still editing parts of the thread. The idea behind is this, namely when discussing with people face to face we cannot edit what we have said; we can only correct it by saying I said this but I meant to say... . Here we can edit our comments in a limited way (we have our moments we just hit the wrong keys) and that can be helpful. But afterwards, when other people have reacted, well, all is said about this here already. Still wanting to edit longer? Copy and paste it into a text-editor (Notepad is finegreat) and when you're ready you hit the edit-button, copy and paste your text from your texteditor and voil there you are. I tend to see discussions as much as the face to face ones and will edit only my text- or html-errors (usually :)