A customer pointed out the following scenario:

Links to attachments located on Wiki pages include extra details in the URL, e.g. https://nw.wiki.com/download/attachments/716144722/Products.pptx?version=1&modificationDate=1327594360398 (namely the version number and modification date).

If someone copies such a link e.g. to send it to someone else but in the meantime the page owner uploads a newer version of the attachment, the link on the page will change - the version number and modification date will be different. After that the copied link still works, but it leads to an older version of the attachment, not to the latest one.

The simplest solution is to always remove the version and modification date parts from the copied URL before sending it, however it is not an obvious one.

Link of attachment in pages should not include version & modificationDate but instead use an absolute link.