A. Nonny Mouse Design, Spain
Web Design, Web Development, Web Managment Web Design & Development
Management & Maintenance
I have recently done two Joomla 1.5 to 2.5 migrations. Both were multilingual sites and both were a challenge to do not only due to the multilingual aspect but also the size of the sites, the amount of extensions and various other things. By far the most problematic aspect of the migration was the Joomfish multilingual part of it.

I go into this a little in my article about the update of an animal charity site. When I have more time I will go into the migration issue in detail. I am hoping that by the time I do, there will be a good resolution to the Joomfish migration issue.

UPDATE:
I just updated the title of this article to include migration from 1.5 to 3 as I recently have done this twice. I was pleased to find that the extension SP Upgrade is now available to use to migrate to 3 since I know that 2.5 will only be supported through this year (2014).

The two migrations from 1.5 to 3 went smoothly and because neither were multi-lingual sites they were much easier to do than the migrations mentioned above. In both cases with these recent migrations I was able to translate the old 1.5 template to 3 without too much bother other than the work involved in making it responsive which is, admittedly, a reasonable amount of work if you want to do it right.