Amazingly I cannot find that anyone else is posting about this problem! My computer has been hogging RAM and running slow since my upgrade to OS X 10.7. I've brought the computer in multiple times and in the middle of all that my hard drive crashed. Apple replaced it (still under warranty) and my slowness problems were blamed on that. But the slowness continued! Finally, after several little "fixes" done by Apple Geniuses at the store, I was told I'd have to wipe the drive and start over NOT from a backup. As a last ditch, the tech uninstalled the OS as far back as he could go and installed and upgraded again to OS X 10.7.4. Most things work OK - but my yahoo mail typing is funky. It puts a period where the apostrophe should be, like this: I can.t come to work today because I couldn.t start my car. It is driving me crazy and looks unprofessional! I have checked settings in mail. All seems well. Please help!