I am testing my plugin on Magento version 18.104.22.168. Installation on Magento Connect Manager seems to be ok but when I try to find it in configuration tab in Admin Panel - it's not there (it works on earlier versions for example 1.9), so I went to directories where it should be installed and I found something strange... Magento changed every php file from my plugin package to empty directories, for example:
It's now a folder with "Layer.php" name and it's empty.
I need to copy everything manually to install it correctly... Does anyone had this problem before?