There is a bug in showing tooltips. For instance open this: http://kurikku.com/s/52ef0f9ce4b0630f318682b3/apl-generate-polyominoes-in-apl http://kurikku.com/s/5

There is a bug in showing tooltips. For instance open this: http://kurikku.com/s/52ef0f9ce4b0630f318682b3/apl-generate-polyominoes-in-apl http://kurikku.com/s/52ef0f9ce4b0630f318682b3/apl-generate-p... Hover line 5, and move the mouse straight down to line 6. The tooltip will remain the same. The tool has it's applications in education. Good work. Just please redesign the homepage, because it looks like a mobile web site right now ;)