may be a stupid question, sorry for that :
Is it normal that Thunderbird Portabl 2.0.0.23 is rebuilding the index every time I switch computers. Its odd that the application even registers the change of computers if it truly portable. Do I have a setting wrong. Also I don't think I noticed this in older versions.
any input appreciated
Could be due to the drive letter being different between the two PCs. The launcher seems to process a lot of data on startup whenever the drive letter changes (this is part of portability, as if the drive letter isn't updated in all files that reference it, the program won't work right as it'll try to access an invalid path). Try changing the drive letter to match on both PCs and see what happens.