[Tagging] Layer=* tags disappearing

[SomeoneElse]

  On 12/10/2010 06:39, Peter Budny wrote:
> I've noticed that some bridges and tunnels I've edited previously no
> longer have layer=* tags on them.  I could swear they did before.  Is
> there some bot (or person) going through and removing them?
>
There was a bot a couple of years ago that ADDED layer tags to bridges 
and tunnels.  I had a problem with that because it didn't know about 
layers that hadn't been mapped yet, but the person in charge of it 
responded to criticism immediately and stopped adding extra tags.