PNGs created by tool cannot be opened again #29
Description
when embedding a text into image "b" and then embedding image "b" into image "a" there's following problem:
image "b" can be extracted without any problem.
image "b" will be saved as "PNG".
but then image "b" can't be open again via "upload" freezes with "loading b..."
a bit strange: as workaround it can be renamed to "JPG", then it opens again and the text can also be extracted.....