Redmine

I got a Ticket, about a Problem in one of my projects. If a customer uses HTML-Tags in a textarea and he wrotes the begin of a html-comment <!-- in the following the rest of the page is not longer to use because some browser imlicit closes the textarea.
But also the Text-Output of the Site iss corrupted. In the yellow report-area (also as i was using the Comment-Start-Tag in the subversion comment) i discovered the same output-error.