hi
phpMyAdmin usually exports the db correctly
being French, the least i can say is that my dbs are loaded with special chars... and actually the only time i’ve had problem with was once when forgetting to set the db charset to utf8 before importing the db on a new server
solved it exporting the db without compatibility, deleting all the tables, setting the right default charset for the db and then importing the whole stuff again.
now if you former db charset was not utf8 you may have those strange chars already in the db... (check a content in phpMyAdmin) you’ll have to deal with this the hard way... make a dump, make sure your file is an utf8 file and then search/replace, sorry
have swing