idmap.ldb not auto incrementing xidNumber for new users after latest git

[steve]

Version 4.2.0pre1-GIT-73278cd

The CN=CONFIG entry in idmap:

# record 7
dn: CN=CONFIG
cn: CONFIG
lowerBound: 3000000
upperBound: 4000000
xidNumber: 3000040
distinguishedName: CN=CONFIG

no longer increments after a new user is added after the git update
yesterday. In my example, it sticks at 3000040. Previously, it
incremented correctly.

Any ideas?
Cheers,
Steve