squat index files - upgrade 2.4 to 2.5

[Per olof Ljungmark]

Hi,

Can someone confirm that the squat indexes must be completely rebuilt 
after 2.4 -> 2.5 upgrade? We just did that and we only see new messages 
in the searches.

We did move from skiplist to twoskip as well, supposedly this cases the 
problem.

Or is there a better way?

Thanks,

//per