I'm using Freerouting occasionally and I like it a lot. However, in the last month I have noticed a long delay after attempting to close or minimize any dialog box.It takes 1-10 seconds, or even more. It happens even on the fastest machines I have tried (Dell Precision 2xQuad core).
I have tried to give Java 4Gigabytes heap or more, but without success. Does someone know about a fix?