If you want to reset xform with out fucking up your rotation: create a box align the box to the problem object using only rotation and position convert box to editable poly attach problem object to box select box in element mode and delete now your problem object has its scale cleaned up but retains its rotation and pivot.…
Ugh, I hate Reset XForm. Because, as Vig has demonstrated, it totally ruins your transforms. But I don't even like Reset Scale because it just hides the scale and doesn't actually reset it. You should just avoid scaling at the object level altogether, period. Uniform or otherwise. Scale messes with everything on a very low…
A little info to add...you have to reset the scale for the parent (probably the shoulder)...it was scaled non-uniformly and the child (your biceps) rotates in the deformed transformation matrix of the parent, this getting skewed like you see. Best thing is, to completely avoid using scale (at all) on object level. Always…