Opera Software has released version 7.5.4 of their namesake web browser for Windows, Mac, Linux, FreeBSD and Solaris. Opera supports HTML, XML, XHTML, RSS, WML 2.0, and CSS. XSLT is not supported. Other features include IRC, mail, and news clients and pop-up blocking. This release fixes several security bugs. All users should upgrade. Opera is $39 payware.