(just my working notes, sorry it might be boring, I'll delete them when I have a solution)
OK, I just ran a Convert with ImageMagick, without changing anything - size just went from 710 to 464 K
----
Isn't it cute ?? Still can't upload it
Lets try if it's related to width or height...
------
Still not, although it's now narrower than Maslanik's graph above.
Let's try a last trick for tonight
---
Ok, with ImageMagick I converted this damn file from png to bmp, then back to png
Still no way !!!
I give up for tonight, BUT a bunch of bytes won't defeat me, stay tuned !
---
I'm baaack - and the damn bug is still here tonight. So it doesn't seem kinda time-related.
----
Ouch, I tried changing some code in a php file (following advice from another guys who had this problem) and immediatly it appeared to be a bad idea - I couldn't browse the forum anymore - nor pload the file of course.
Still searching
----
And what about a small jpeg ?
---
Ok a 100K jpg was fine (removed it)
What about a png now ?
--
GOSH it WORKED out !!!
Let's try with the original buggy file ??
OUCH it worked again...
So, it seems that
- uploading a jpeg file will unlock the uploading feature
- that I can upload a png after a jpg unlocked the damn thing
- and that I can upload other pngs afterward.
Let's Announce This To Our Beloved Users !!!
(of course I don't have the lightest idea about why this worked out..)