Folks, I find myself in a slightly odd position. Up until a couple of months ago I was running Koha 1.2.3 very satisfactorily. At that point I rebuilt the box it was running on and installed Ubuntu. Koha wasn't too high on my urgency list (getting my ecommerce site back was rather more urgent). However, I had taken a database dump so thought I could easily rebuild Koha when I had the time. My game plan was going to be to re-install 1.2.3 from scratch, overwrite the database with my saved copy, and then progress up through Koha releases until I got to the current one. I sat down last night to start the process and found, horror!, that koha 1.2.3 is no longer available for download, so my game plan was scuppered. As an experiment, I tried installing 2.2.6 with the existing database in place, and got a number of complaints from the installation and a general feeling that things hadn't gone properly. I now know about the mysql4/5 problem, and will rewind the database server to mysql4 before I start again, but can someone give me an idea of how I should proceed? Have there been database changes between 1.2.3 and 2.2.6? How should I get my 1.2.3 data into a new install of 2.2.6? Just a general hint or two would be helpful. I'm reasonably competent with databases, perl and unix cli. Help! Nigel