Slashes in ID3 tags not properly displayed

I have a collection of songs by the old rock group AC/DC. According to official convention, the band name is spelled with the slash. All of my songs have ID3v1, ID3v2.3, and APEv2 tags, and in all tags, the artist name is spelled "AC/DC". However, when listed in Banshee, it displays the song artist as "AC; DC", which is clearly wrong. Even though my tags are all correct and correctly display everywhere else within Ubuntu and elsewhere, I have attempted to correct the tags in Banshee (right-click --> Edit Track Information" by changing "AC; DC" to "AC/DC". The changed tracks will then display correctly for a few seconds, and then revert back to "AC; DC".

Operating System: Linux Mint 11 Katya (based on Ubuntu 11.04)
Banshee: v2.0.0