I have recently updated WordPress Version to 3.8 from old WordPress version.
So i have to Export/Import my old site data to new site with WP latest version.
Then i export the data from Old site and then import to New site. All the posts, categories, tags are imported but what i found is, there are some problem with the categories hierarchy. they are not well formatted in parent child relation as in my old site. All categories are goes on parent.
Also found problem with comment data format. It is not displaying properly. It is displaying with the code like date format %d %Y...