Using a locale that uses a decimal separator other than decimal dot (e.g., comma):

1. Create this Basic macro:

sub foo
  dim x as double
end sub

2. In Basic IDE, put a breakpoint to the "end sub" line.
3. Run the macro.
4. When the execution is paused on the breakpoint, make sure that the Watched Expressions are shown (check menu View), and put "c" into the "Watch" box, then press Enter to add the "x" variable to the Watched list.
5. See that the Value is shown to be 0.
6. Double-click the value (the double-click must be over the value text) to edit it.
7. Type a floating-point value. Try both using a standard Basic decimal dot, and the locale-specific decimal separator. E.g., try to input "1.2" or "1,2".

=> it's impossible to make the value of the variable equal to the entered floating-point value. It may become 1, or 12, but it will not accept the decimal separator properly.

I suspect that it broke after the change in bug 97983. The code in SbxValue::PutStringExt, and in ImpConvStringExt called from there, is intended to handle internationalized input, making it standardized to decimal dot, but with the change when the standard conversion uses only internationalized strings, it unconditionally changes the decimal separator to the dot not accepted in the conversion.