We often have troubles uploading pictures.

We operate two ebay stores. And we are normally logged into both simultaneously but one using Firefox and the other using Google Chrome.

On the Firefox one pictures will upload in half the time the very same picture will upload using Chrome. That makes it look as tho its the web browser doing something wrong but when we swap browsers the slow one is till on the same account.

So we are convinced it has something do do with the account rather than anything else.

Could be that different accounts are located on physically different servers somwehere and not all servers are as quick as each other. That's just my take on it.