Comment 1 for bug 751456

Could you attach sample SVG files explaining your problem visually, and possibly a screenshot how it looks in your Inkscape?

Do you compare rendering of the blurred and clipped objects in Inkscape, on-canvas, or is this about the exported bitmaps (PNG), other export formats or SVG renderers?

I can't detect an unevenness of the clipped blurred circle in a simple test following your initial description, screenshot attached).