plesk messed up directory permissions

I made a big mistake, since plesk told me my worpress installations weren't "safe" I allowed it to "fix" it. Now it seems that directory permissions are wrong (it seems it just sets any directory to 755, regardless of the actual needs). Jetpack updates won't install with
"An error occurred while updating Jetpack by WordPress.com: Could not create directory."
Jetpack also is very intelligent, to not tell *what* directoy it couldn't create, to help fix it
Also my Nextgen Gallery...

plesk messed up directory permissions