**System Information**
Windows 7 64 bit, 2x gtx 570
**Blender Version**
Broken: Blender 2.69, built 2013-12-18 18:35, hash 4b206af
Worked: Blender 2.69 r61228
**Short description of error**
When using a mirror modifer above a bevel modifier, the bevels on the mirrored side of the mesh are incorrect: http://i.imgur.com/lUdZMfj.jpg
When viewing vertex normals, you can see the mirrored verts have strange normals which is probably the cause of it: http://i.imgur.com/3RGGzIx.png (though in older builds that work, the vert normals show strangely as well but the bevel works fine: http://i.imgur.com/zCiwvXd.png)
**Exact steps for others to reproduce the error**
1. Add an edge loop vertically on the default cube
2. Delete the four verts on one side
3. Add a mirror modifier and set the axis appropriately
4. Add a bevel modifier.
This is probably due to recent changes to the bevel modifier ([[ http://developer.blender.org/rBda91575206cda63966fbd526378de98a866e8e5c | rev1 ]], [[ http://developer.blender.org/rB1158c1f7c0ec3f5d31989cb85207a08888d2c0d3 | rev2 ]], [[ http://developer.blender.org/rB7a899ce9fc7fbcea219c12afe49c08114505b3aa | rev3 ]], [[ http://developer.blender.org/rB9a78cda32111be9e1c9e2b9c158b27334d3c8804 | rev4 ]], [[ http://developer.blender.org/rB39673718864f018307e49fac62696341b3230628 | rev5 ]], [[ http://developer.blender.org/rBbfb9cefccbf8ff9733e9739e9c4dbc93a762bebe | rev6 ]]), but could also be because of changes to the mirror modifier ([[ http://developer.blender.org/rB7214001cdb142cb2556135b1f6e35290c62b9a69 | rev ]]). Or both.