Lunarpages has just (last weekend) upgraded to MySQL 5.

What version of ZC are you running? Anything older than 1.3.5 may struggle with MySQL 5.

You say that your tax settings have gone wonky. This is a Dbase setting.

How did you import your existing database (from homestead) into new database (lunarpages)?

In the past, I have done a simple FTP of the webshop to a new server, and using phpMyAdmin, exported the database using EXPORT as SQL, then copying the dump into Crimson Editor.

Then, create your new dbase on lunarpages C-Panel (MySQL), then login to phpMyAdmin on lunarpages, and using the SQL window, copy and paste logical sections of the sql off Crimson Editor. This will CREATE the tables and INSERT the data appropriately.

You'll now have an IDENTICAL dbase on your server at lunarpages as you do at home.

Apart from the configure.php files, the most important thing is to use fix_cache_key.php (see downloads/troubleshooting) to set the cache_write directory to the correct path.

So if everything goes okay - your shop will show. I just did this exact thing with www.des-uk-shop.com