Comment 2 for bug 509897

Using Inkscape 0.47 on Windows XP Ctrl does not behave as described in the manual. What I see when using the select tool:
- Holding down Ctrl forces the current ratio to be maintained
- Holding down Alt forces the current ellipse to be scaled by integer amounts vertically/horizontally
- Holding down Ctrl+Alt behaves the same as just holding down Alt

When using the ellipse tool Ctrl only constrains the shape to be a circle as long as it has not been turned into an ellipse with the select tool. After that it forces the current ratio to be maintained instead. I also think I saw a situation where Ctrl was maintaining the ratio, but inversely (rotated 90 degrees). If I can find behaviours that reproduce this I will file a bug.