6.34 - build 1886, Win7 Pro.
Quite often I've noticed that when selecting a group of new files that they will not shift to the Download List and the Logging tab will indicate the following: [18:13:35] ERROR - Resolver: Unable to find Download data
Bypassing filters does not help.
However, if I log in to a search site and create an NZB for the same files, they load and download quite nicely.
This web search can be done prior to loading Newsbin (it happens to many of the same files in different groups, different posters) and when Newsbin fails to find the files I load the same listing from a websearch and they work.