Recently I imported from Redmine, using the Redmine Importer, but, it is no longer supported by Atlassian. They suggest to use a CSV import.
When I export from Redmine, using CSV, I am having trouble including the 'Notes', which will be imported as 'Comments'.
In the previous import, with the Redmine importer, I was able to bring over all of the 'Comments'.
I am currently using Redmine version 2.2.2.stable.