I used POI (HSSF) for many years to export tables to excel. Since the update to POI 3.8, I have a bug by formatting the cells of the table in Excel.

Environment:
Windows XP; Excel 2002, SP3; 

The problem:
When I create a table, open it in Excel und click at the thousand separator, the cell gets a ‘$’-Character in front of the number (formatted as currency). 
Next, when I click on the button currency, Excel format the cell with the thousands separator. 
I get this problem with the SXSSF-libraries as well as with the HSSF-libraries.

Reason:
The order of the predefined formats in the class BuiltinFormats (package: org.apache.poi.ss.usermodel) has changed.

3.8 (wrong)
putFormat(m, 0x29, "_(\"$\"* #,##0_);_(\"$\"* (#,##0);_(\"$\"* \"-\"_);_(@_)");
putFormat(m, 0x2a, "_(* #,##0_);_(* (#,##0);_(* \"-\"_);_(@_)");
putFormat(m, 0x2b, "_(\"$\"* #,##0.00_);_(\"$\"* (#,##0.00);_(\"$\"* \"-\"??_);_(@_)");
putFormat(m, 0x2c, "_(* #,##0.00_);_(* (#,##0.00);_(* \"-\"??_);_(@_)");
		
3.7 (right)
putFormat(m, 0x29, "_(*#,##0_);_(*(#,##0);_(* \"-\"_);_(@_)");
putFormat(m, 0x2a, "_($*#,##0_);_($*(#,##0);_($* \"-\"_);_(@_)");
putFormat(m, 0x2b, "_(*#,##0.00_);_(*(#,##0.00);_(*\"-\"??_);_(@_)");
putFormat(m, 0x2c, "_($*#,##0.00_);_($*(#,##0.00);_($*\"-\"??_);_(@_)");