Scientific bugs definitions

Bohrbug is a "good, solid bug".

Mandelbug is a bug whose causes are so complex it defies repair, or makes its behavior appear chaotic or even non-deterministic.

Schrödinbug is a bug that manifests itself in running software after a programmer notices that the code should never have worked in the first place.

Heisenbug is a software bug that seems to disappear or alter its behavior when one attempts to study it.

Hindenbug is a bug with catastrophic behavior.

PS: originated from http://en.wikipedia.org/wiki/Heisenbug