Databases garbled after export/import

Hi guys. While developing I make regular backups of my database. I do this by exporting my database as an SQL text file using phpMyAdmin and then when I need to import I do the same process the other way around. This works fine except that I noticed that some of my content (text) ends up garbled like this:

"Community involvement and support is an essential part of the team’s off-field activities."

Is this actually from importing/exporting or might this be a different problem all together?

Thanks,
Luke