Coex changing subject line to random meaningless characters =?utf-8... (4325024)

Coex changing subject line to random meaningless characters =?utf-8...

After upgrading our coex. Domino server 9.0.1 from FP5 to FP10 the subject line on some emails is being replaced by random meaningless characters.

This is a Domino regression bug which was first introduced in FP8 and fixed in IF2. This bug reappeared in FP10

IF1 and IF3 fixes the bug. The IBM details are: JBAMAVKUPX ( https://www.ibm.com/support/pages/apar/LO93608 ) Fixed an issue where the subject line encoded (UTF-8) after upgrading to Domino 9.0.1FP10.
IBM Domino 9.0.1 FP10 IF1:

    PPUEASMHAW
    Fixed a potential security vulnerability with the IBM Domino Diagnostics service Security Bulletin: IBM Notes NSD Privilege Escalation (technote 2010777)
    PPUEASUDSF
    Fixed a potential security vulnerability with the IBM Domino Diagnostics service Security Bulletin: IBM Notes Privilege Escalation in IBM Notes Diagnostics service (technote 2010767)
    MKINAUWTG4
    Fixed a potential Server memory leak
    DVDI9UNH38
    Fixed a potential Server crash
    JBAMAVKUPX
    Fixed an issue where the subject line encoded (UTF-8) after upgrading to Domino 9.0.1FP10
    KBRNAVLMA3
    Fixed an issue where the version string returned was incorrect with the API NSFDbGetMajMinVersion after upgrading to Domino 9.0.1FP10

 Please ensure your Notes.ini files are in UTF-8 format. The easiest way to do this is to open the notes.ini file in Notepad++ and look at the status bar. If it is not UTF-8 then please save it as UTF-8. This is critical. Secondly, please download the latest IF (Interim Fix) for FP10 and apply the IF.
Please contact HCL for download info and support.