After upgrading to V1.1.6 I found the following message in the Message Manager:
Error: Can't upgrade file : 'admin/controller/common/page_layout.php
All file and directory permissions are set per the installation instructions. I got a message that the 'extensions' directory was not writeable, even though it is. I suspect it was complaining about one of the subdirectories. (I just did a recursive permissions change to '777' for everything in 'extensions' so that should not be an issue in the future.)
I completed the upgrade using the FTP option, and everything seems to be fine except for this error message.
~~ Grey