My first question on stackoverflow

Here it is:
http://stackoverflow.com/questions/3965331/weird-behavior-around-same-erasure-compilation-error


Playing with the code on the edge of compile and runtime errors is fascinating. Compilers are software components and may have defects and deficiencies. Language specs may have wholes and ambiguities too. But these are thoroughly tested in labs and then applied daily by hundreds of thousands (if not millions) of programmers so they must be almost perfectly clean. Almost. But still not perfect.

How far from this "still not perfect" is the software you write?