1] The JFS /AUTOCHECK:+* switch is no longer honoured. This means that it is impossible to *force* chkdsk on drives that are Dirty but marked as Clean.
My technical opinion: Note that with '+*' you can't force anymore any clean-marked volume being checked at all, regardless if it's dirty or not.
When a dirty boot volume is marked clean, it's time to boot from another volume and perform the chkdsk from there. If that would happen for other volumes, you have now also to boot to another volume for that. Is that really that important? How many times happened that for you?
2] Since installing this JFS release my system often "loses" a drive volume at boot. I have JFS formatted volumes G: through L: with H: and L: being bootable. About 1 in 3 boots I notice that G: is not mentioned at all during the JFS chkdsk display.
Once booted I can get G: to display in the Drives folder by running LVM and then exiting using Save and Exit - with no changes made and - Voila! drive G: appears in the Drives folder.
I would give David at least a few weeks time to investigate this and to react to your recently posted bug.
I agree with you that this needs fixing and if it's somehow reproducible, chances are not bad to fix it.