Upgrade to 8.5.2 FP1

I recently upgraded my Domino servers on zLinux to R8.5.2 fixpack 1. After the upgrade some of the file names turned green while others remained black. Does anyone know what this means or why it happened?

Subject: Executable bit

They are executable files more than likely new to v852 which are highlighted in-green in the output from the “/bin/ls” command.