ORAChk version 12.1.0.2.1_20141009 false clusterware version warning

I've just run this tool on a 11.2.0.3.5 RAC getting, among others which are true positives, at least a false one:

 

WARNING: Clusterware software version does not match across cluster.

 

But when checking the details I find that the versions match

 

DATA FROM ORA11GCPOCOR01 - CLUSTERWARE SOFTWARE VERSION COMPARISON

Oracle Clusterware version on node [ora11gcpocor01] is [11.2.0.3.0]

 

DATA FROM ORA11GCPOCOR02 - CLUSTERWARE SOFTWARE VERSION COMPARISON

Oracle Clusterware version on node [ora11gcpocor02] is [11.2.0.3.0]

 

If I compare opatch output I find it to be identical

 

Node 1:

Installed Top-level Products (1):

 

Oracle Grid Infrastructure                                           11.2.0.3.0

There are 1 products installed in this Oracle Home.