• Welcome to the Lightroom Queen Forums! We're a friendly bunch, so please feel free to register and join in the conversation. If you're not familiar with forums, you'll find step by step instructions on how to post your first thread under Help at the bottom of the page. You're also welcome to download our free Lightroom Quick Start eBooks and explore our other FAQ resources.
  • Stop struggling with Lightroom! There's no need to spend hours hunting for the answers to your Lightroom 6 questions. All the information you need is in Adobe Lightroom 6 - The Missing FAQ!

    To help you get started, there's a series of easy tutorials to guide you through a simple workflow. As you grow in confidence, the book switches to a conversational FAQ format, so you can quickly find answers to advanced questions. When you upgrade to subscription, there's also a Lightroom Classic version available.
  • It's Lightroom update time again! Color Grading and improved zoom across the whole Lightroom family, plus graphical watermarks for the cloud-based Lightroom apps, as well as the usual new cameras, lens profiles and bug fixes. See this blog post for Lightroom Classic and this blog post for the Lightroom Cloud Ecosystem changes.

Potential JPEG bug in Lightroom 3.4 and Camera Raw 6.4

Mark Sirota

Senior Member
Oct 8, 2007
Philadelphia, PA, USA
Lightroom Experience
Power User
A significant bug has been found in Lightroom 3.4 and Camera Raw 6.4 that can cause corruption of original files.

This only applies if:

  • Your original files are JPEGs
  • The JPEGs include large amounts of a specific type of metadata
  • You write your XMP data back to the originals
The vast majority of users will be unaffected, but as the bug can corrupt original files, it's still significant.

For more details, see the post on Lightroom Journal.


Senior Member
Jun 19, 2009
Zurich, Switzerland
Lightroom Experience
Thanks, Mark.

5 days between the first bug report and the acknowledgement with a planned fix date is pretty impressive, I think.

... and a good reason to go 3.4.1 when it comes out.