If all goes well, we are planning on doing the upgrade to LibLime Koha 4.12 the week of May 28. It will most likely occur on the evening of May 29 due to the Memorial Day holiday. Testing is underway and so far we have identified one bug that will need to be fixed prior to the upgrade. We are working on the Release Notes and will make them available next week so that you can prepare for the fixes and new features that will be included. At this time we do not expect substantial workflow changes.
We do expect that there will be a fix to Talking Tech (Harriet) so that patrons are not called for holds they have picked up (SCLS Support Ticket 40862). There is really no way for us to test this ahead of time, so we may want to be prepared for some tweaking to occur to this process on the day of the upgrade.