Permissions error saving or exporting iWork 3 files

Question

Using Numbers 3.0.1. I consistently get permissions errors Saving As or exporting a Numbers (or the new Keynote) document. Even to my Desktop.
I've recently repaired permissions on this machine (via booting to the Recovery Partition). Occasionally choosing another save location will do the trick, but often not. Usually it doesn't matter where I try to save to. Sometimes quitting the app and restarting helps. But more often than not, the issue continues.

Answer 1

Ok, using the Console log I was able to spot the file "com.apple.iwork.numbers". I deleted it, restarted the computer and oh magic it worked.
I still won't be that confident as I have this issue coming in and out. Sometimes it works sometimes it doesn't.
If anyone know where to look, this is my consol log related to the issue:
04/02/2014 17:37:59.716 Numbers[438]: Failed to generate image for binding FileInfoBinding [0x303] - extension: numbers, UTI: com.apple.iwork.numbers.numbers, fileType: ???? at size:16 and scale: 1 filename: (null)
          1   IconServices                        0x00007fff9206de92 ___ZN18IconImageRequestor35generateCGImageFromBindingResourcesEU13block_pointer FvP7CGImageE_block_invoke + 689
          2   IconServices                        0x00007fff92067278 ___ZN8ISClient23GenerateCacheImageAsyncEP10_LSBindingjjU13block_pointerFvP8ISDi gestjj11ISSizeRangeyE_block_invoke + 727
          3   IconServices                        0x00007fff92067cbc ___ZN13XPCConnection11postMessageEPvU13block_pointerFvS0_E_block_invoke + 66
          4   libxpc.dylib                        0x00007fff8f101be6 _xpc_connection_reply_callout + 47
          5   libxpc.dylib                        0x00007fff8f101b72 _xpc_connection_call_reply + 36
          6   libdispatch.dylib                   0x00007fff8db532ad _dispatch_client_callout + 8
          7   libdispatch.dylib                   0x00007fff8db577ff _dispatch_async_redirect_invoke + 154
          8   libdispatch.dylib                   0x00007fff8db532ad _dispatch_client_callout + 8
          9   libdispatch.dylib                   0x00007fff8db5509e _dispatch_root_queue_drain + 326
          10  libdispatch.dylib                   0x00007fff8db56193 _dispatch_worker_thread2 + 40
          11  libsystem_pthread.dylib             0x00007fff8a090ef8 _pthread_wqthread + 314
          12  libsystem_pthread.dylib             0x00007fff8a093fb9 start_wqthread + 13
Message was edited by: Mikkael_Bristol