Roller 0.9.6 looks good.
I did a clean checkout from CVS, downloaded this site to my Mac and rebuilt everything from scratch. No problems - even the upgrade script worked flawlessly - less that fact that I still had my temp tables from the last upgrade. Problems I saw in IE/Mac where: 1) the <jsp:plugin> tag doesn't seem to work to render the new editor applet, maybe I should revert back to using the <applet> tag, 2) javascript errors in the editor UI when trying to set focus on hidden elements. Actually this is a Struts bug since it writes the javascript for setting focus. However, the javascript has a check for type != "hidden" - so who knows. It works fine in Windows, so I'll fix it if we get some complaints from Mac users.