BX-cvu52? Is it still a problem for you?
I also tried uploading a photo when this error code problem was first announced back on the 22nd of April and as you can see from the picture post I was able to upload a photo with no problem! (I didn't even have to use the bypass procedure to get out of the error screen because there was no error screen to be gotten out of).
So apparently this particular error code only comes up for some people and not everyone. If you are still getting the error code then you should still report it to the blogger.com staff or ask them for the bypass process so that you can get out of the error screen altogether.