I just updated my oldest machine from gentoo-sources-3.14.37 to 3.14.38, which introduced some new behavior that I find annoying, but I'm not sure it's really a "bug". (It could be a "feature", I suppose):
This (old) machine still has a floppy disk (I told you it's old) and of course during boot the kernel wants to know what hardware is attached and it tries to read from the floppy and prints an error message to the console that /dev/fd0 can't be read (because it has no floppy disk inserted). But this new kernel 3.14.38 tries to read the floppy disk every time I type "mount" at a bash prompt, and then spams the screen with errors about /dev/fd0. My real puzzle, I guess, is that this new behavior was just now introduced after *37* patches to kernel-3.14, which has always behaved the same way until today(!). Could/should kernel patch number 38 really introduce new behavior? This is not the first time I've asked myself this question, and I don't know the answer so now I'm asking you guys.