I ran into a couple issues after installing a fresh copy of 9.1, both dealing with the content editor. The first is related to assigning icons to items, and the second is related to Display Names for friendly field content entry. I've detailed them below and what I've already attempted:
1) Assigning custom icons to Items - I'm attempting to assign custom icons to an item, and after selecting an icon from "Core 1", the icon selected disappears in the treeview and I notice I receive 404s in my network requests when it attempts to find these icons. The path it's attempting is /~/icon/core/16x16/home_brown.png.aspx. I double checked that I have read/write permissions for the following users: "iusr, IIS_IUSRS, network service, sc910.sc", and there are files and folders insinde my /temp/IconCache/Core/, however it does not contain a 16x16 folder, just a 32x32 and 48x48 folder. Is there some trick I am missing?
2) I created a new template and created some fields inside this template. I am trying to make these fields a little more personable to the content entry folks, and I changed the display name (and also the validated that the display name in Standard Fields looked appropriate) however I do not see these display names after I insert a new item (or look at existing items) that use this template. It still shows the regular "name" vs the "display name" when editing these items. It seems I am missing something here as well?