Created attachment 110936 [details] Video that demonstrate where to look I've attached video that demonstrates the problem. In short, you are able to enter decimal values in Tool options dialog, but as soon as you submit them (by pressing Enter) they show rounded value, even though on-canvas presentation stays correct - represents the values you've entered. Not really the best demonstration, but you will figure it out.
Hm, that's proly because it's a bit silly to have floating point values for pixels. I guess in the situation that the user input floating point values into the docker, we should switch to the actual vector unit: pt, or we should allow floating point pixel values.
I would propose allowing frictions of a pixel in input field. That is not so uncommon in vector editing software. You would need that either way if you want crisp edges on for example 3px wide stroke. The second solution is to actually sync what is on canvas with exact values entered in input widget. This is a solution I don't favour because it limits a workflow in some cases (see above).
*** Bug 416833 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 466582 ***