Kovid,
My apologies for not responding sooner. The sudden death of a long-time and close family friend, and many work-related issues arose unexpectedly. Now that I've caught up to the rest of the forum...
I was able to finally setup the old computer system. This is a WinXP SP3 system, running calibre 0.9.37. I created a virtual library for Jules Verne comprised of 23 titles. I then used Edit Metadata in Bulk to swap title & author (per the checkbox). As the requested change gets underway, I see both a spinner and a progress bar below it in the progress dialog. As previously stated, the percentage completed does not ever reach 100%, it falls one iteration short, with the dialog closing when it should reach 100% complete (ex: 0%, 5%, 10% ... 90%, 95%, close dialog). However, this less capable system keeps the processing dialog onscreen for a longer period of time.
Using the new computer, Win8.0 and calibre 1.8 & 1.9, to run a similar test the same issue occurs, but because of the streamlining of the backend, or better CPU, it is harder to notice. In this case, only a spinner is shown, but once again it falls short of 100% before the processing dialog closes.
I realize that both computer systems need to be updated in order to make a fair comparison, but I didn't want to alter the old system in case you wanted some additional info/specs. Both systems are using the same external USB HDD and library. I think I've got some screenshots from the old system, but I forgot to sneakernet them over for uploading.
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