Can anyone tell me when the 64-bit version of Quick Fields will be available? We are currently running Quick Fields 9 on a Windows 2012 Server.
Derek is right. Quick Fields is resource intensive. If you're going to run Quick Fields Agent, you probably want to separate it on its own machine. Capture Engine is usually bound by network and disk speed (its primary job is to get docs out of the repository and onto the local temp folder where Quick Fields will process them). NuanceLS.exe is started by the OCR engine and should go down when OCR is complete. If they're sticking around, you might want to have your reseller talk to Tech Support. The issue could come from either Quick Fields or Import Agent since they both have OCR capabilities.
Since you mention Capture Engine running at 25% CPU, it sounds like this is a 4 CPU server? If you're planning on expanding your usage of Workflow, that would be the first one I would plan to move to its own server. You can probably keep Quick Fields and Import Agent together for a bit longer and monitor performance.
What we are working on is a Quick Fields Server that will centralize session management. That will have a 64-bit version and released later this year. Quick Fields itself will stay 32-bit for now.
I don't know what the "Official" answer would be, however I have found that Quick Fields does take up quite a bit of resources. When I was a VAR, I usually recommended to my client that Quick Fields be on its own server. Main reason was the processing power the other had to deal with security. Most IT people didn't like users having to remote into the Laserfiche Server to run Quick Fields.
Where I am now, my Quick Fields is on its own server with nothing else. I have found it runs very well this way.
There are currently no plans to make a 64-bit version. Is there any reason why you think a 64-bit version is necessary?
I have installed several Quick Fields on Server 2012 without any issues
Wow! my support guy told me that you were working on one that should be out soon.
I have Quick Fields on the same server with License Manager 9, Workflow 9 and Import Agent 9. The CPU runs high (99%) when I manually run a Quick Fields session. I do have several other sessions on a schedule that may or may not be running at the same time in the background. This manual session is using OCR when sending the documents to the repository, the only other page processing is extracting token information from the source path to fill the metadata.
It appears that it is the "Laserfiche Capture Engine" process that is running high, not necessarily the QF program. It appears that 2 processes of the "Laserfiche Capture Engine" are always set at 25% CPU each so the system is steadily running at 50% CPU all the time.
Yesterday, (and I have seen this in the past also) there were 20 or more processes of NUANCLS.EXE showing up in Task Manager and it shows that they are tied to the service account I have running for Laserfiche services. (I cleared them out late yesterday and the CPU processing has gone down today) I'm not sure if I am spelling it right (NUANCLS.EXE), but it will show the QF's icon associated with it also. So, I thought maybe it was the program itself.
As far as the other programs, I have Import Agent monitoring 40-50 folders and only 1 current workflow on a schedule that runs twice a day (Noon and 5 PM). I am working with 5 repositories and will be creating more QF sessions. Would you suggest that we move QF to its own VM server? (I hope this all makes sense) 
Thank you!
Robin