Adobe has released the v12.0.2 update for Photoshop CS5.  This is mostly a maintenance and performance update.

• A number of potential security vulnerabilities have been addressed
• Top type and font crashers found in the field have been addressed
• A number of performance issues have been addressed
• Crash opening 3D layers has been addressed
• Color Engine crash has been resolved
• Intermittent file format issues addressed
• Shift scrolling bug fixed
• Sharpen crasher fixed
• Marching ants not seen at certain zoom levels fixed
• Metadata focus distance issue addressed
• File info bug addressed for Orphea Studio jpg files
• TWAIN crashers fixed
• Brush cursor bug fixed
• Histogram progress bar issue fixed
• Droplet issues addressed

Updates can be downloaded here.

Windows - http://www.adobe.com/support/downloads/detail.jsp?ftpID=4893

Mac - http://www.adobe.com/support/downloads/detail.jsp?ftpID=4892