Can not download: http://tm.mania-exchange.com/tracks/view/6/learning-curves
Object reference not set to an instance of an object.

[edit by eyebo: In 2017, the map file is still corrupted. I've hidden the map]

http://tm.mania-exchange.com/tracks/view/64/perpetual-change
Signature mismatch. The replay cannot be uploaded.

[edit by eyebo: In 2017, you can upload replays on the above map, so that seems to be fixed.]

I was not able to download Learning Curves either

I was able to download Perpetual Change, but it looks like your problem is with uploading a replay, right? I know some solutions have been posted in the relevant topics in the Site Discussions forum.

same for me on learning curves, both download and install&play don't work.

It's a known problem. The actual track file doesn't exist in the database (it mysteriously disappeared). We'll resolve the issue soon.

This also can not be downloaded:
http://tm.mania-exchange.com/tracks/view/9316/ko2-district-17

File format wrong

knockout tracks (by MX-KO) can't be downloaded - it's not a bug. what is knockout

Jarektmnx says:
This also can not be downloaded:
http://tm.mania-exchange.com/tracks/view/9316/ko2-district-17

File format wrong

Seems valid to me. Plus Space submitted an offline record, so it has to be valid. Perhaps someone else can correct/confirm me?

lol forzy. probably you can download track because you're moderator; and I submitted a replay right from knockout - it was an autosave + replay submitting works fine.

Space says:
knockout tracks (by MX-KO) can't be downloaded - it's not a bug. what is knockout

Ok. This track will download for all at a later time?

maybe, but definitely not soon.