There is a bug in our PDF pipeline for the TAG where some rounded rectangles in SVGs are rendered with sharp corners. The issue is that svglib fails to handle the fact that SVG allows you to specify just one corner radius and the other should be assumed to be the same. This has been fixed upstream from version 1.3.0: https://github.com/deeplook/svglib/commit/9d280dbeda774af24d4ee4ef81452bccb0810044 We are on version 1.1.0.