Zebra rows (comments) - Opera border problem.

[BBC]

I did separated odd and even in style.css, and made comments with different background-color.
All for better visual separating of comments (1 odd-1 even).

But there is a problem with odd-even borders in Opera.

All browsers show borders OK in odd and even comments. (1px, solid...nothing special)
But Opera display duble borders in odd comments. It takes border from even to, and put them at odd comments. (top and bottom only, not left, right)

Is there some solution for this ?

All other browsers show it OK.

[BBC]

Just for clarification.
I removed rounded style from CSS and tpl_comment.php.

[smart]

May be some styles are overrided in your Joomla's template? Try to check this using DragonFly tool in Opera..