When changing, adding, or inserting a string against a old value,
the new value will be corrupted.
Actually, I saw:
- a char is deleted
- chars are rearranged in a wrong order.
- etc...

So this is saying that some multibyte can be input sometimes
but its not correctly shown or interpreted

for example the ordering of mbyte characters is not always correct -

here are some observations of those in Japan:
NOTE - these letters abc, def, etc below should be viewed as mbyte -

Original name: abc

To insert "def" between "a" and "b".

After renaming, the name should be "adefbc".
                                     ^^^  
But actually, the name is "adbcef".
                            ^  ^^  

This applies, to any Input of the edit control area in any diagram
when using mbyte and the mbyte input tools.


2. When starting to input 2-byte chars
   against all 2-byte/1-byte chars that are reversal-selected.
   (Please see RevSel.gif. It indicates "reversal-selected".)

3. When starting to add 2-byte chars
   at the end of existing 2-byte/1-byte chars.

-----
In the following 2 cases, the chars are incorrect in order.

4. When starting to input 2-byte chars,
   when a caret exists between 2-byte/1-byte chars.
   (Please see Caret.gif. It indicates this situation.)

   This means "When inserting 2-byte chars, ".

5. When starting to input 2-byte chars
   against a part of 2-byte/1-byte chars that is reversal-selected.
   (Please see RevSel2.gif. It indicates this situation.)
   
   This shows the worst result. For example,
   The original name is "abc", and "ab" is reversal-selected.
   
   abc  ~~

   When changing "ab" to "def", the result should be "defc"

   defc
   ^^^

   But actually, the result shows "abdcef".

   abdcef
   ~~^ ^^

   That is:
   1. Existing "ab" is not deleted.
   2. New "def" is incorrect in order.