Problems fixed by CU´s in SharePoint 2013 Search since release

March 2013 update
Server: KB 2767999
Foundation: KB 2768000

• When you perform a search on a SharePoint Server 2013-based server, you experience performance problems on the server.
• The output cache feature does not work on a page on a SharePoint Server 2013 site. This issue occurs when the page contains a Content By Search (CBS) web part.
• Assume that you use the Cross-Site Publishing feature to create a site on a SharePoint Server 2013-based server. When you perform a search on the site, the search results is greater than the expected number.
• Assume that you access a SharePoint site that is not in your trusted sites list. When you try to search an item on the site, you receive the following error message:
  • “The display template had an error. You can correct it by fixing the template or by changing the display template used in either the Web Part properties or Result Types.”
• When you try to perform a search crawl on a list that contains many columns in SharePoint Server 2013, you receive the following error message:
  • “The filename or extension is too long”
• Assume that you filter data in an Access form on a non-English version of a SharePoint Server 2013 server. In this situation, Full-Text Search in SQL Server does not work correctly. More specifically, the filtering operations are slow or return incomplete results.
• When you perform a search in a SharePoint Server 2013 search center in backward compatibility mode, the out of box (OOB) site refiner returns incorrect results.

April 2013 update
Server: KB 2726992
Foundation: KB 2751999

• Assume that you install multiple Search Service applications in SharePoint Server 2013. When you use a Search Service application to crawl a site, managed properties are not displayed in the Search Service application. Instead, the managed properties are unexpectedly displayed in another Search Service application. 

June 2013 update
Server: KB 2817414
Foundation: KB 2817346

• When you pass query parameters to query rules from Search Web Part on a SharePoint Server 2013 site, the search results are not updated. 

August 2013 update

Server: KB 2817616
Foundation: KB 2817517

• When you remove a SharePoint Server 2013 server from a SharePoint Server 2013 farm, the search admin component on another SharePoint Server 2013 server crashes continuously.

October 2013 update

Server: KB 2825647
Foundation: KB 2825674

• This update improves the stability of search components in large server farms.
• The language selection drop-down list on the search page does not extended fully.

December 2013 update
Server: KB 2850024
Foundation: KB 2849961

• When you add a friendly URL or a URL to a non-published item under Search Center Navigation on a SharePoint Server 2013 site, you receive the following error message:
  • Sorry, something went wrong
  • An unexpected error has occurred. 

Service Pack 1
Server: KB 2817429
Foundation: KB 2817439

• Search schema compression is now enabled by default to allow larger search schemas.
• Highlighting for FQL queries is now enabled for FQL as well as KQL.

Office 365 - upgrade to SharePoint 2013 Search Problems

Actually the first O365 tenants are updated to SharePoint 2013 backend components in the background. This results in some technical difficulties. One is the Search. The SharePoint 2013 Search Engine based on a new / upgraded Search Backend system. The FAST Engine had a big impact in all the new functions and features. More details can be found here: http://nbsharepointtalk.blogspot.de/2012/07/whats-new-within-sharepoint-2013-search.html .

If your tenant is updated to the new backend system but your frontend is still SharePoint 2010 you have some loosing. The point is that a lot of keyword calls not working anymore. For example: Path:"Posts" AND -Path:"personal" (meaning: show all which contains “Posts” but not contains “personal” in result it shows blogposts but not posts from blogs hosted in MySites). The reason is that the Managed Property “Path” no longer exists in the new Search Engine. It is replaced by ”SPSiteUrl” and so on…. Another point is, that the new Keyword Query Language and also FAST Query Language which is now supported in SharePoint 2013 cannot full functionally be used with the SharePoint 2010 UI, even the search backend is upgraded. This is because the SharePoint 2010 Webpart are not able to handle search term like author:starts-with("Nicki"). So this is a poor interims situation at the moment. But the complete update is availible soon ;-) and then we can use the full functionality of the new Search Engine.