I am importing from vBulletin 4.5 to XF2.0.1, with collation latin1, and I have many instances of special characters in my database (such as begin/end quote characters 0x93 and 0x94) from Windows-1252/cp1252.
Examine stepPrivateMessages(), for instance, in vBulletin.php:
The problem, from what...
Downloaded 2.0.1, had the same problem today:
InvalidArgumentException: Received invalid UTF-8 for string column [username] in src/XF/Import/Data/EntityEmulator.php at line 79.
Importing ~140,000 users from vBulletin 4. Character set on the user table is Latin1; running a script to check...