Up until the beginning of this week I have been able to use my LR 2.3 to import, edit and export my RAW files. I haven't changed anything about my uploading or importing process. It will allow me to import my jpg images, however when I try to import any RAW images it says that they may be "unsupported or damaged. (227)" I can see my images and open them in CS6. Any ideas of what might be the problem and how to fix it?!
What camera model? Can you upload one of these images that will not import to http://www.dropbox.com and post a public download link to it in a message, here?
And another question, why are you still using LR 2.3 when LR 2.7 is available without paying more money?
You can get newer LR 2.x versions by clicking on the Windows or Mac links under Lightroom near the bottom of the 2nd column on this page: http://www.adobe.com/downloads/updates