I've discovered that the Java 5 /1.5 may be slow for CMC for switching the 'big card'. This might be because it's 1.4 code (I can compile to 1.5, but that doesn't work in 1.4 clients and I haven't tested 1.5 code + 1.5 client for speed) but I'm not sure. If you're running 1.5 can you tell me if it's running abnormally slow when mousing over cards?