Problem replying, HTML format, Chrome

[rdefauw]

I'm using Chrome 12 and Zimbra web client. When I reply to an HTML format email, the original message is quoted with the blue line on the left. When I go into the middle of the quoted section and hit 'Enter' to start a new line with my response, the new line still has the blue line on the left, so it looks like its part of the original message.

This does not happen on Firefox 5.

Any ideas?