When WinMX has been running for some time my WinMX screen goes completely blank. The program continues down- and uploading, but I can't see exactly what it's doing. Going to settings-appearance-load standard colors sometimes helps, but not for very long. The only thing to get it running properly again is quitting the program and restarting.
I am running WinMX 3.54 beta4 with WinXP.