[ubuntu-za] Thunderbirdv12.01 Backup and Restore between 10.04 & mint12?

[Vincent]

Hi All,

I've got 12.04 running on my desktop & mint12(ubuntu 11.10) on my 
netbook, both using TB12.01.

My problem is that backing up TB and then trying to restore to 10.04 
doesn't work. However in the past when running 10.04 on the netbook, 
this always worked perfectly.

The default mail paths in mint were different to 10.04, so I changed 
them to the default in 10.04, still no joy.

Does this mean that files in 10.04 and 11.10 are not compatible, or am I 
missing a trick here?

Any help would be appreciated.

Vince