Description:
After upgrade to Libreoffice 3.4.x (3.4.3-4 in this case) opening many files in Calc (and only Calc) caused an instant "an unexpected error has occurred" message to be prompted. In addition, some files would always crash the moment a cell was modified (recalculation issue?).

Having read a few forum threads about issues since package splitting issues, it appears some of the extension packages being missing can be a cause of such problems. With no extension packages installed (I have little use for most of them) I chose to look through the list and see what might be most related to the problem. Installing libreoffice-extension-ct2n fixed the issue. All files open OK, no more crashing of files.

It appears the dependencies need to be investigated. This extension is very small so maybe should become part of Calc?

Additional info:
* package version(s)
libreoffice-base-3.4.3-4
libreoffice-calc-3.4.3-4
libreoffice-common-3.4.3-4
libreoffice-en-GB-3.4.3-4
libreoffice-extension-ct2n-3.4.3-4 (installed to fix issues)
libreoffice-impress-3.4.3-4
libreoffice-kde4-3.4.3-4
libreoffice-writer

* config and/or log files etc.
none

Steps to reproduce:
Clean Libreoffice install with Calc, opening a fairly complex spreadsheet from a file manager window.