I haven’t updated yet, but it seems the issue with the sound locks is not in this update. When holding down a sound lock, the Sounds list covers up close to half the parameters, and none of the parameters are highlighted. They all seem to be set to 0 or their default state.
List of changes from OS 1.30 to 1.30B
Changes
[MKII] Key repeat rate has been increased.
[MKII] Menu keys are now lit when the menus are open.
[MKII] Filter 1 resonance slightly adjusted.
Bug fixes
[MKII] The mini keyboard LEDs would not show the correct note value.
[MKII] Control input port B would only be calibrated if set to the same mode as port A.
[MKII] Accent level could not be set.
[MKII] Pressing the active parameter page key would immediately toggle to the secondary page,
instead of showing parameter values.
[MKII] Graphics was missing from the settings menu.