I might be enlightening an already well known problem, but i noticed whenever a picture is submitted by a contributor member, the alias system is not working, and the tags that are ought to be replaced by another are staying the way they are.

Example : http://e621.net/post/show/51018/
"vera" should have been replaced by "bethany_sellers"

I seem to be a Contributor, and aliases are working for me. Sadly. Latest alias stupidity: anatomically_correct → feral *rage*.

Can I turn off aliases on my tagging?

It's working correctly with a tag edit, but not upon a picture upload.

For the feral thing, there has been an ununderstandable debate about that :
http://e621.net/forum/show/1583

Anonymous, I know, I have no idea why it got accepted, and it sort of annoys me, seeing as it's completely wrong. Apparently it won because not many people use anatomically_correct, which doesn't seem like much of a reason to use a wrong alias, but whatever.

Here is another example i just spotted : post #54753.
"xianjaguar" should have been aliased to "brenda_diantonis".

Additionally, clicking on that tag is automatically aliasing the tag research, and the original picture does NOT appear in the research list.

So basically, it's impossible to find again the improperly aliased pictures for manual correction.

Kald said:
Here is another example i just spotted : post #54753.
"xianjaguar" should have been aliased to "brenda_diantonis".

ITYM the other way round: see xianjaguar on the wiki :)

Additionally, clicking on that tag is automatically aliasing the tag research, and the original picture does NOT appear in the research list.

So basically, it's impossible to find again the improperly aliased pictures for manual correction.

the artist has tried to correct tagging of their works themself by the looks of it, and couldn't due to the alias getting in the way. I've gone through and slapped "xian" and a year on those as a temporary placeholder for the artist's proper nym, and raised an alias deletion request through the stupid-looking "...#please-remove" convention: http://www.e621.net/tag_alias?query=please

I wish we could get rid of tag aliases. It's not exactly a misfeature but it's very rough around the edges, and most of the aliases which have been accepted have been done so without much oversight or thought. And damage that misapplied aliases do can't be un-done very easily.

90%+ of alias are not the object of a semantic debate and can be kept as they are.

The alias issue i'm pointing is a ponctual problem and is more a coding issue than an improper utilization.
There is no need to nuke the whole system because of that.

I was just able to reproduce the context in which this bug happens :
http://e621.net/post_tag_history?post_id=69129
http://e621.net/tag_alias?query=themadcatter&commit=Search+Aliases

Much like the double tag bug, it happens when you preceed the tag by a type marker (artist:), in this case, i had uploading with "artist:themadcatter", which is normally aliased.

I've noticed this too. For example, if tag1 is aliased to tag2, adding tag1 to the image results in an image with only tag2 (proper). However, if you add artist:tag1, then you end up with an image with tag1 (not proper). Then if someone goes and adds tag1, it properly changes it to tag2, but there's still tag1 on the image, so you end up with both tag1 and tag2.