Mac OS X problems with 4.2.19, 4.2.21 andy 4.2.22

What can I do in order to fix issues when Mac connects to ReadyNAS device?

Only RAIDiator 4.2.17 works with folder and file permissions, but TimeMachine does not work with Mac OS X Lion. I know the latter is a known issue with this version of firmware, so I would like to upgrade to a more recent release, but I have other, bigger issues with more recent releases.

SETUP
Two units:

• ReadyNAS Pro Business Edition (3x1TB and 2x2TB; 2TB used) FW 4.2.17 Serial <REMOVED BY MODERATOR> (disks 3x WDC WD1003FBYX-01Y7B0 931 GB; 1x WDC WD2003FYYS-02W0B0 1863 GB; 1x WDC WD20EADS-00R6B0 1863 GB)


• ReadyNAS Ultra 6 Plus (3x2TB) FW 4.2.17

Accessing from:

• iMac with Mac OS X 10.7.5 (Lion)


• Macbook Pro with Mac OS X 10.7.5 (Lion)


• Macbook Air with Mac OS X 10.7.5 (Lion)

SYMPTOM

• Incorrect file permissions in Mac OS X Lion (wrong Owner, wrong Group permissions, Everyone has R/W when it should be either Read Only or No Access)


• Files and folders disappear from Finder; the files are still there, but they are not visible in Finder... these "lost" files re-appear when I downgrade back to 4.2.17


• TimeMachine does not work anymore

TROUBLESHOOTING I HAVE DONE
To tried to resolve the file permission issues by re-applying the correct file permissions through Frontview, but this does not have any impact on the file permissions in Mac OS X
I have looked through this Forum, on Wiki's, and in Google, without any reference on how to address these issues even though I do see many people experience similar issues.

QUESTIONS

• How can I resolve these issues I am seeing from my Mac OS X systems?


• Is the support for Mac OS X being phased out leaving only CIFS and NFS as means to access the ReadyNAS devices?


• What is Netgear's and the ReadyNAS Team's commitment to Mac OS X?

Thanks!