Opera 10.54 for Windows is a recommended security upgrade. Opera highly recommends all users to upgrade to this version to take advantage of these improvements

• Prevented Opera from being used as a vector for a font issue in the underlying operating system, as reported by Microsoft's security team; see our advisory (http://www.opera.com/support/search/view/954/).
• Fixed an extremely severe issue; details will be disclosed at a later date.
• Fixed a highly severe issue; details will be disclosed at a later date.
• Fixed a moderately severe issue; details will be disclosed at a later date.
• Fixed a less severe issue; details will be disclosed at a later date.