Duplicate descriptions

For about a month now, most of my show descriptions in Recorded TV folders are broken. The correct description is displayed for a very brief moment when selected, then it is replaced with the description of the first show chosen in the folder. All recordings in a folder will display the same incorrect description (except for the one for which it is correct of course). It seems to be the one I choose first in the folder (so, either the top one, or, if I hit the up button on entering the folder, it will be the last one’s description). Some folders don’t exhibit this problem, but both recent and older folder do.