What is 'BONK' error on Flickr Upload Page?

When uploading photos & videos to Flickr fails, you get a 'BONK' error message. There could be various reasons behind failed uploads. It could be 

  • because of a corrupt photo or video file, 
  • because of un-supported file type, 
  • connection time out etc.
Update : Flickr recently made some changes to its free account that makes it difficult for users to bulk upload or auto upload photos unless they upgrade to a Pro subscription.

Quick Tip to ensure your Photos never go missing
Photos are precious memories and all of us never want to ever lose them to hard disk crashes or missing drives. PicBackMan is the easiest and simplest way to keep your photos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your photos are - PicBackMan does the rest, automatically. It bulk uploads all photos and keeps looking for new ones and uploads those too. You don't have to ever touch it.

Your photo backup assistant

PicBackMan is a free photo/video uploader that helps you to keep your memories backed up to your favorite online services.

Users in 130+ countries have backed up.

Kip Roof

   ... an excellent job of uploading more then 300GB of photos to 2 different services

Alen Serafino testimonial I have a large collection of photos and videos to upload on some of my storage account and I was looking for an application that can do it all automatically, and that it did especially well. I found a definitive answer to my needs thanks to this amazing program and that it is constantly improving whith new fantastic features. - Alen Serafino
Gavin Whitham testimonial PicBackMan was really easy to setup and has been running for 3 days now backing up all my locally saved photos to Flickr. My photos are really valuable to me so it's great to be able to have them easily backed up to a secure location. - Gavin Whitham
Dave testimonial PicBackMan was an answer to many a prayer. How can I get this MASSIVE collection of photos onto a service that cripples uploading? PicBackMan. I uploaded approximately 85,000 photos in less than a month. It would have taken me close to a year to get all of those photos where they needed to go. Nothing short of brilliant. - Dave
Julia Alyea Farella testimonial LOVE this program! Works better than ANY other program out there that I have found to upload thousands of pictures WITH SUB-FOLDERS to SmugMug! Thank you so much for what you do! :) #happycustomer - Julia Alyea Farella
Your pictures are scattered. PicBackMan brings order to your digital memories. ...
PicBackMan automates the process of uploading pictures to multiple photo storage sites.
Top rated photo backup application. PicBackMan cnetdownload rating
It's easy, convenient and can handle thousands of pictures at once.