Hi,
Exchange house seems to be busted. It's not listing items for sale under catagories.
To reproduce,
List an item for sale - in my example, Engineering Consoles. I did this just to guarantee that something was for sale.

Then, after a decent amount of time - go search for it. In fact, go search for any Engineering Console. Nothing is there.

However, if you search for "Console - Engineering" in All, they all show up:

Bugged this in game, but wanted to post and see if it's just my client as well.
Comments
I mentioned it in this thread also.
http://forums.startrekonline.com/showthread.php?t=69878
LOL I was just going to post that. For example, clicking on the the 'ship console - engineering' tab yields nothing, but clicking on the 'all' tab and typing 'console - engineering' in the 'search by name' field shows all of them. It's a bit clunky, but it works.
Can search by exact title in All to find items, can't accurately search the categories using a keyword, and after some testing, the search engine seems to have problems with single word searches.
Searching by keyword in a category will produce sometimes no results, sometimes a handful of results, and sometimes will produce a lot of results that still are not the full range that would fit the search (checked this using a search in category and then the same search in all)
Also, and this doesn't happen always, where the search on all or a category will turn up more than one page of results, clicking through to the second page seems to negate the search word, so the second and later pages are full of random things.
Workaround at the moment is to do a refined search using the All category still, though makes it harder if you can't remember the exact title of the items you are searching for, or the exact format of the name.