That is because comments are not allowed to use HTML with Live 3.0.1.
If you had read the readme.txt about tooltips, I did outline this issue.
---------------------------------------------------------------------------
----- Tooltips.
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Live template has never been able to display the extra item information
that HFS can provide (such as comments), until now.
We have come up with a tooltip system, it integrates with the current
interface and displays when you hover on items, or the server
information in the footer. You can hover on the tooltip itself to pause
and read the information.
If you do not want tooltips you can turn them off in the
template settings.
[color=red]
HTML markup and Double Quotes are not allowed in the comment field
of Live. A small HFS macro is used to prevent this issue from breaking
the template.[/color]
Actually I will expand as to why that is here,
I use a custom attribute on each item, and fill the content of the tooltip dynamically with JavaScript. I can't use double quotes otherwise it breaks the attribute string, and I can't use HTML because it breaks the template, depends on the markup you use, but its bad to let it happen. You shouldn't need to use anything for the comments, Live is only designed to have small informative item comments anyway.