red green blue stripes when viewing cr2 files in iphoto11

I have an upgraded mac mini(early 2006) with osx snow leopard and iphoto11. When viewing cr2 files(these are canons raw files) iphoto there are several red green and blue horizontal stripes accross the picture. This does not appear in preview or in picasa. This was not a problem in osx tiger. I have googled this upside down and havent found an answer yet. JPEGS displays fine.
Any ideas.

Welcome to Mac-Forums

Quick question have you installed any updates for iPhoto '11 since it came out? If not then get them downloaded, there are a few bugs in iPhoto '11 that they managed to sort with the last couple of updates so it could sort your problem too.

- Simon

Buzzard2010 said:

Welcome to Mac-Forums

Quick question have you installed any updates for iPhoto '11 since it came out? If not then get them downloaded, there are a few bugs in iPhoto '11 that they managed to sort with the last couple of updates so it could sort your problem too.

- Simon

Click to expand...

There were some updates today yes, installed and same problem. This drives me crazy. I just love iphoto, but now i must maybe start shooting in jpegs.