Im using JSON to transfer data from my server to my client and vice versa. I compress chat message strings with LZString to save space. This works fine, except for 4 character m
there are control characters, which seems to you like a space. for example have a look at the ASCII 0-31 http://ascii-code.com/
Maybe try to copy-paste into Windows Editor (not Notepad++ or word) and pasting back into your json data.