IBM has pulled out from fixcentral the brand new FP5 because there is an issue upgrading from previous FP or Hotfix installed that prevent the correct end and also prevent Notes to run ..
If you will try to upgrade Notes from previous FP you will probably get this error
"The wizard was interrupted before IBM Notes 9.0.1 FP5 could be completely installed." At this point, Notes may not launch. Installing 9.0.1 FP5 on 9.0.1 Gold installs without error.
Only the standard version on windows is affectet but IBM is investigating about the behavior on Linux.