Opera released an update to the latest version of its browser on Thursday.

Version 9.51 of the software fixes an unspecified code execution flaw, but the main focus of the upgrade involves performance tweaks to version 9.50, a major upgrade issued last month. The latest version of the software is designed to resolve problems with search engines when upgrading from Opera 9.2x, a stability issue involving printing, JavaScript issues and various performance tweaks as detailed in Opera's release notes.

On the security front the update addresses flaws in the "canvas" functions that might expose data in memory as well as the unspecified code injection bug. In addition, the patch is designed to resolve bugs which meant switches to secure server sessions were not clearly indicated.

Opera 9.51 is recommended as a security and stability upgrade to users of the alternative browser on all platforms as explained here.

The Opera patch follows hot on the heels of an update to Firefox issued earlier this week and designed to resolve 12 bugs in version 2 of the open source browser, four of which are rated critical. Users are advised to upgrade to version 2.0.0.15 if they haven't already moved onto Firefox 3.0, which is not affected by these particular bugs. ®

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