Ok I am a noob at magento.
I was playing with the sample data 1.6 in a 1.7 environment. Whenever I Disable or clear the cache in the Cache Management I cannot log in.
I get ***************
There has been an error processing your request
Exception printing is disabled by default for security reasons.
I turned on the Log Settings to true, but I do not see anything created in magento/var. There is not a log/system.log file.
I Changed the file permissions to all folders to 777. R- W - X
Any help is greatly appreciated.