In another thread Katie suggested RADIX. or RADIX, to be used for instructions whose line numbers are to be referred to from other instructions (GTO, XEQ or similar) to avoid these being deleted. This is a nice proposal, in Katie's brilliant style.
However, trying this revealed me a (stupid) bug that a user who uses dot as a radix could never figure out. However, the first thing I do when I receive a HPcalc is to change the radix dot (.) into radix comma (,) and to enable thousands separator (dots, not commas). This is how we write numbers here.
The BUG: if in RADIX. mode you switch to PRGM and select DISPLAY or MODE RADIX, everything is normal. The program step is RADIX. or RADIX,
If you do the same in RADIX, mode when you select 6, (meaning RADIX,) the program instruction entered becomes RADIX. instead of RADIX,
In preselected RADIX, mode when you select 5. (requiring RADIX.) you obtain RADIX, in program listing.
Yes, yes, I know that this is a completely useless information, but I really cannot think about this as a feature rather then a bug.
This would, hopefully, be my contribution to the bug hunting season.