After upgrade magento to 1.5.0.1, my client’s website was stuck in magento maintenance mode. I wasn’t able to easily find a way to fix it by looking in the normal database tables, but did locate a file called “maintenance.flag” in the magento root.
So, to fix maintenance mode look for the maintenance flag and remove it and your shop will be back online!
Liam
Brian R Cline
Montpro
jayendra
admin
Robert
suneth
Brian Cline