I just recently bought the house in Solitude and I have stored most of my weapons in the weapon racks, plaques, etc. I leave the house to transfer all my items from my old house there and when I come back, Ebony Blade is not on the weapon racks while all the other items are still intact. Any fixes for this besides reloading last save and will this affect the Oblivion Walker achievement?

Luckily for the walker achieve you only have to have gotten them at one point (selling or losing them will not change that as one daedric artifact is consumed on use)

As for Ebony Blade, it doesnt like weapon racks (display cases work fine for it) check around the floor for it, should still be near the rack it was put on, advise not to keep putting the blade on a plaque as it eventually bugs out the plaque.

yes, in general, some people are experiencing different levels of bugged weapons racks. Some have racks on the floor that have 5 slots, only 3 work. Some have wall racks where daggers or bows don't display. Others have the racks eat their items. Some have no issues.

I myself had one of the wall racks in Solitude eat Ghostblade. Moral of the story is save often so you can go back, and NEVER EVER EVER put weapons, shields, or armor you actually care about (i.e. unique sets, improved/enchanted how you want, etc) on racks or mannequins. Ever. I've learned my lesson, and im glad it was just Ghostblade and not a Daedric artifact. I think patch 1.4 addresses some of this though.

I feel for you. As far as the achievement i think the game keeps track of the fact that it was in your possession (according to the strategy guide) since you can sell things offs ( i keep them all in a chest though).

Thank you guys for the replies.

Yea, the Ebony Blade doesn't like to stay on the shield plaque either.