While I had thought that Mister_Rain was the standard tag, I'm seeing in tagging history that even I've used "rain". I cannot tell how many have been changed, or whether it was ever the more popular, but as of now there are 5 pages using "rain" and 5 images using "Mister_Rain"...
originally it was "mister_rain" the popular one, while rain was less used, if not used at all.
But AIE somehow has a beef with the "mister something" tagging and go tagging shit the way he wants, regarldess if people already got used with the previous tags and changing them right now is counterproductive.
I looked at the tagging histories though, and many of them look like they were the original... You're right, I do remember Mister_Rain being popular, but the tag histories seem to show rain being the original tag. Of course, I don't know exactly how the tag history system works...
Those were probably the ones that were just tagged "rain" as opposed to Mister_Rain. If it said Mister_Rain, or Mister_ anything else he came across, the whole tag was deleted. The ones I restored were the ones I knew how to find with other distinctive tags; with this one, with clammbon and melting. Most of the Mister_Dogs pics that I fixed were delicious_trap images. And so on.
The standard now, is that most objects and things are now classed by mister_. They should be consistent... and it's far more work to retag all those than to retag mister_rain to rain. They might have been a joke, but they've got a certain charm to them... and it's not /too/ much extra bother.
As a note, tag history seems to have a limit. I don't know how long it keeps for, but I still remember there being a lot in mister_rain as opposed to rain (and the same for a lot of similar tags).
...and it's far more work to retag all those along with with mister_rain to rain, rather than keeping mister_rain (and merging rain into mister_rain)....
Anyway, no need to retag it yourself and waste hours. Post up the changed tags on the groups and detail what's been changed and I'll take a look. The tag cloud is sort of a mess to wade through.