So I have got the .ai file from our designer and I have to save it to a specific size to then be used on a website.
I have aligned all shapes to pixel raster (not sure if this is required) and I have changed the reference point to left-top (in order to avoid blur).
When saving for web I choose Optimize Art and I save it as a transparent PNG-24.
Now, why is there a mysterious, vague line next to one shape? When I look at it in Illustrator, that same line is visible, but when I zoom in you can see that the shape is perfect without the mysterious line.
In case it might help, the line is there from bottom to 50% of the shape (vertically), everything else is perfectly sharp.
What am I doing wrong?
I hope I used the correct terms, as my Illustrator is in a different language.