The System is Window 7 Enterprise 64bit with 8GBytes RAM configured for the UK. When I first start up LibreOffice after the installation from the MSI has finished it starts the unpacking/deployment but stops with an error at the step describe in the dialog box as 'Enabling: Danish spelling dictionary, hyphenation rules, and thesaurus' It will do this every time I try to run it. If I run the program via Windows troubleshooting compatibility option and cause it to start up in Windows XP (SP2) compatibility mode which did allow 3.4.5 to work I still see the same problem. If I only select the English language dictionary option rather than the default of all languages there is no problem.
Nobody has confirmed this bug for 2 months and I cannot reproduce it either.