Could you, temporary, turn off autoimporting and see if the problem is still there.
Like I said above, if I do this, the Problem does not apear.
But I played again a little bit around and I can circle in the Problem now a whole lot more: Ususaly I have, like I said above, autoimported my nzb from my usual Download-Folder (C\AAA\). To be not misunderstood: THIS IS NOT my alt.binz Download Folder, but the Folder where I store everything my Browser Downloads. So my NZBs. And all the other stuff, like updates of Programs ect. If I turn autoimport from this folder on - the Problem apperars. If I turn it off - it does not appear.
BUT - AND THAT'S THE NEWS! - if I change my autoimport Folder for the NZBs (I took the ususal ...\alt binz\nzb\), turn autoimport on, put some nzb in this folder and unrar something out of alt.binz - no problem aPpears. It autoimports the nzb and unrar flawless at the same time.
That leads me to the conclusion, that the bug must have something to do with the autoimport out of an Folder where not only nzbs are stored. What is strage, because I had never this Problem before - until I updated from 0.25.0 to 0.26.9 (and I always autoimported bevor from the same folder, where all the other stuff is stored).
I hope this helps to fix this bug. My workaround will be to look up, how I can teach my firefox to download only nzbs to an extra folder. But it would be very cool If you get this fixed.