First off thanks for making this free version accesible. It is a great tool and it has made building bicycle frames a reality for me/others!

I have tried on several browsers (Explorer, Safari, Firefox, Chrome) on several differet computers/platforms.
Every time I attempt to change a wheel size from custom to standard I get a Java error.

In fact I beleive anytime I attempt to change a "custom" default value to "standard" the error is occuring.

Anyone else seeing this.
Java is up to date on all tested machines.