Why Part 1 Partty Appears in Mathematica's DSolve Expression

Question

I am trying to solve a differential equation:

DSolve[{0.02*x^2*y''[x] - y'[x] - y[x] == 0}, y[x], x]

But I got warnings:

Part::partw: Part 2 of {1} does not exist.

How do I understand this warning? Thank you very much.

Answer 1

I can reproduce this in V7.0.1, but not in V8.0.1, so it looks like an error that was fixed at some point. The final answers are the same in both versions.