Rare screen problem ( i can`t see song titles and band names)
Sony's are especially sensitive to certain characters - it is possible that there is a character in the band/song name that is causing the defect - this is unlikely, since you say that it's occurring on all songs. Try resetting the language back to English in the Sony menu just to be sure.
Another possibility is that the ID3 tag is in a version that is not supported by the player. Unfortunately, I went through all of the product documentation, and it doesn't say which ID3 tag versions it is compatible with. This is time-consuming, but you could downgrade your ID3 tag editor, delete all songs off your player, and then reload them to be sure.
-Tha Mp3 Doctor