Replicating or backing up a wiki is always a pain, especially if the wiki and/or the backend database is of a different version. Following is one technique that greatly speeds up the process (for me). I've used the following to copy pages between (in both directions) versions 1.6.x and 1.11.x. Some of the features are different in one direction but you'll get the idea of how it's done.
1) Log in as admin on both wikis
2) On the source wiki, select "Special Pages", then "All pages".
3) Run "vi titles.txt" (this is just a file name that I used)
4) Cut an paste the titles into your open titles.txt.
5) Run the following in command mode (in Vi)
:%s/<TAB>/<CTRL-V><CTRL-M>/g
Note: Those are keys, not the actual text to type in. CTRL-V, followed by CTRL-M, will cause Vi to generate carriage returns. What you're doing here is converting tabs to carriage returns.
6) Review the list and remove any blank lines. Hit ":w" to save the file for later.
7) On the source wiki, select "Special Pages", then "Export Pages".
8) Copy and paste some or all of the titles in work.xml into the text box in "Export Pages". Clicking on "Submit query" will display an XML file in your browser (I recommend Firefox).
9) Instead of copying and pasting the output from #8, right click on the screen and select "Save Page As". Enter "work.xml" (just an example name that I used) and click save.
10) In your target wiki, select "Special Pages", then "Import Pages". (You have to be logged in as the wiki admin to see this option. It's under "Restricted Special Pages".)
11) Click on "Browse" and find your "work.xml", then click on "Upload file".
12) If everything went well, you should see a list of the titles uploaded, followed by "Import succeeded!".
13) Repeat the previous steps as needed to get all of your files moved.
14) The above won't have copied your main page. Depending on you configuration, you may need to cut and paste the main page, or you may need to re-index a ton of now-orphaned pages on your target wiki (it all depends on how you have your wiki set up).
<comments>Copy_MediaWiki_pages_between_different_version_wikis</comments>