Created attachment 50623 [details]
Simple spreadsheet previously sorted on the range A3:C7

When a file is reopened and the previous Sort range is reselected, Calc erroneously ticks the Options box "Range contains column labels".

Steps to reproduce:

1) Create a spreadsheet containing columns of data with or without column labels
2) Select a range not including column labels
3) Use Data | Sort to sort the range
4) Save and close the file
5) Reopen the file
6) Select the same range as in step 2
7) Open the Data | Sort dialog again

Actual Results:
LibO correctly remembers the columns chosen to sort by, but incorrectly ticks the option "Range contains column labels", requiring the user to go to the Options tab to reset it.

Notes:
1) The error does not occur when a new range is selected for sorting. It only occurs if the previously selected range is reselected after saving, closing and reopening the file.
2) This bug did not exist prior to LibO 3.4

Build: LibreOffice 3.4.1 OOO340m1 (Build:103)
System: Windows 7 64-bit

The attached file illustrates the bug. The file has previously been sorted by selecting the whole data range A3:C7 and sorted by column C. If this range is selected again, LibO correctly remembers it was sorted by column C but incorrectly assumes it contains column labels. If any other range is selected, LibO correctly assumes it does not contain column labels.

The bug is independent of the range selected and column(s) sorted by if the above steps are followed from step 2 onwards.