I have found an odd behavior of an uploading images into media library. Depends on a browser, I can select multiple files at the time or not. For example:
It doesn't work in Chrome and in Firefox:
It works fine in Opera:
But it works fine in the Chrome browser on the machine of my colleague.
I thought that the reason is in Adobe Flash which isn't probably installed in my Chrome and is installed for Chrome of my colleague, but not, it isn't installed for both.
Maybe someone knows a reason of this behavior? I need to explain client why he can't select multiple files, but I don't have any idea and I can't recommend him to use Opera browser :).