After my upgrade to 11.10, my libreoffice calc will no longer work with sheets that were fine in previous ubuntu. My budget spreadsheet has approx 5000 rows, and several sheets that calculate based on those rows. Worked fine before my upgrade. Changed nothing else about the 'puter. System monitor during the hangup indicates libreoffice is sleeping and soffice.bin is occupying 95-100% of my CPU? Any ideas?