With a spreadsheet with 57080 rows and 15 columns, I encountered a Fatal error more than once while trying to Search and Replace (Replace All) within selection (selected the entire column) using regular expressions, searching for ^. and replacing with &. This was to get rid of the leading apostrophe in a date column of data imported from a tab separated file. The error occurring seemed to be some sort of memory allocation issue. This is a on a Windows 7 64bit machine with 12GB of RAM. Also in attempting to format that same column to a custom date of YYYY MMMM-DD I got an error that said something about osl thread create failed. It also failed once when I got the date to convert, but then did a left justify on the column.
If it makes any difference, the document in one a samba network share.
Created attachment 115604 [details] Screenshot of one of the errors
I've discovered that selecting the column and doing Data->Text to Column does the same thing when trying to get rid of the leading ' so that the column can be formatted as a date.
I think it was solved with https://bugs.documentfoundation.org/show_bug.cgi?id=90757 also the issue selecting the entire column. With that regex all cell content is lost. Try with search .* and replace & *** This bug has been marked as a duplicate of bug 90757 ***