As usual, you can either use the built-in updater from the Utilities menu, or you can download and install directly from the website: http://www.getpaint.net/ . There’s no need to worry about removing the old version; that is all handled automatically.

This update fixes several issues related to copy-paste, improves performance and quality for a few adjustments, and fixes a data loss bug.

• When pasting an image, Paint.NET will be smarter about ensuring it is placed within the area that has been scrolled/zoomed to.
• Improved the performance and quality of the Curves and Hue/Saturation adjustments.
• Some minor improvements to memory usage, which should help out a few scenarios on 32-bit systems.
• Fixed: If a JPEG was loaded that had an embedded ICC profile, and was then saved as an 8-bit or 24-bit PNG, then the resulting file would be corrupt (32-bit PNG worked fine though).
• Fixed: 16-bit TGAs no longer load with the red and blue channels swapped.
• Fixed: Copy-paste from a Remote Desktop session will no longer be ‘shifted’ by 3 pixels.
• Fixed: Copy-paste from Internet Explorer, Firefox, or Chrome should preserve alpha/transparency.
• Fixed: Copying from Paint.NET and pasting into Windows Live Writer should now work.
• Fixed: Taking a full-screen screenshot with Print Screen on a multimonitor system, where those monitors don’t form a simple rectangle, will now fill the ‘gap area’ with transparent instead of black. (Example: two monitors of the same size, one of which is rotated by 90 degrees)
• Fixed: If Paint.NET is opened without specifying an image to open, and then the default image is modified and saved, then Paint.NET will no longer close it upon opening another one. This was causing data loss if that default image had layers, and was then saved in a format that did not support layers (anything other than .PDN).
• Fixed: Some systems were showing ‘red X’ thumbnails for .PDN files in Windows Explorer, instead of the real thumbnail.
• Fixed: The EXIF “Creation Software” saved along with images is no longer localized. This prevents certain languages from seeing “Paint.NET ????? v3.5.6” in the image properties (metadata).

Hopefully these fixes should make the wait for 4.0 easier to bare

Also, as a bonus feature which is a corollary to how I’m now handling copy-paste from Internet Explorer: if you “copy” an image from Windows Explorer, you can paste it straight into Paint.NET. For example, right click on some stray image you’ve left on your desktop (c’mon we all have a cluttered desktop). Next, paste into Paint.NET. Pretty cool, maybe even useful.

This release fixes several issues related to copy-paste, improves performance and quality for a few adjustments, and fixes a data loss bug. You can download this using the built-in updater (make sure "Also check for betas" is enabled), or just download it directly from the website: http://www.getpaint.net/ (by the way, please do not directly link to the ZIP files)

I should be able to put out a final (non-beta) release within a week or two.

Here’s what’s changed since v3.5.5:

• Improved: When pasting an image, Paint.NET will be smarter about ensuring it is placed within the area that has been scrolled/zoomed to.
• Improved: Performance and quality of the Curves and Hue/Saturation adjustments.
• Improved: Some minor improvements to memory usage, which should help out a few scenarios on 32-bit systems.
• Fixed: Copy-paste from a Remote Desktop session will no longer be ‘shifted’ by 3 pixels.
• Fixed: Copy-paste from Internet Explorer, Firefox, or Chrome should preserve alpha/transparency.
• Fixed: Copying from Paint.NET and pasting into Windows Live Writer should now work.
• Fixed: Taking a full-screen screenshot with Print Screen on a multimonitor system, where those monitors don’t form a simple rectangle, will now fill the ‘gap area’ with transparent instead of black. (Example: two monitors of the same size, one of which is rotated by 90 degrees)
• Fixed: If Paint.NET is opened without specifying an image to open, and then the default image is modified and saved, then Paint.NET will no longer close that image upon opening another one. This was causing data loss if that default image had layers, and was then saved in a format that did not support layers (anything other than .PDN).
• Fixed: Some systems were showing ‘red X’ thumbnails for .PDN files in Windows Explorer, instead of the real thumbnail.
• Fixed: The EXIF "Creation Software" saved along with images is no longer localized. This prevents certain languages from seeing "Paint.NET ????? v3.5.6" in the image properties (metadata).

Contrary to what I said last week or so, I’ve decided to fix more than just 1 bug in the upcoming Paint.NET v3.5.6, and also to port a few other minor improvements from the v4.0 code base. Right now this is in private testing, and hopefully I’ll have another beta soon.

Here’s what I’m planning on:

• The dreaded “red X” thumbnail bug. As it turns out, if you install the DirectX SDK, it stomps on Paint.NET’s thumbnail handler (it’s a shell extension for Windows Explorer). This has been plaguing me for over a year, and I’ve finally fixed it. Thanks go out to luck, guessing, and Sysinternals’ Process Monitor.
• When saving an image (such as a JPEG), the EXIF metadata for “Creation Software” is no longer localized. This prevents some languages seeing “Paint.NET ?????? 3.5.5” in a saved image’s metadata.
• Some performance and quality improvements to the Curves and Hue/Saturation adjustments, courtesy of Ed Harvey.
• Copy and Paste! There are many scenarios that I’m fixing or improving…
  • It’ll be smarter about positioning the pasted image into the viewport (the portion of the image that is scrolled and zoomed to), instead of always jamming everything to the top-left of the image, which was forcing you to madly scroll around when pasting a bunch of stuff together.
  • When copy-pasting from Remote Desktop, the pasted image will no longer be shifted to the right by 3 pixels. This is a bug in WinForms that I’m working around, and was a bit crazy to fix.
  • Pasting from Internet Explorer or Firefox will preserve alpha. For IE9, it actually gives me a link to the file in its download cache, so I can just load that directly. For Firefox, it places a bitmap with the pixel format set to 32-bpp RGB (“no alpha”). However, it lies … so I detect when I should interpret it as 32-bit ARGB instead.
  • If you have a multi-monitor setup, and those monitors don’t form a simple rectangle, then the “gap area” will be pasted as transparent instead of black. As an example, I have two 24″ monitors. The left-hand one is 1920×1200, while the right-hand one is rotated so it is 1200×1920. If you take the bounding box, you have a rectangle where neither monitor has any representation, and this is the “gap area” (or maybe there’s a more precise term, but oh well).
• I’m also planning to fix the issue where a JPEG is loaded that has an embedded thumbnail, then the image is modified, and then the image is saved again … but with an out-of-date thumbnail. This happens because Paint.NET “blindly” carries along all the EXIF metadata in an image (normally a good policy).
• Some minor performance and memory usage improvements. It should improve reliability on 32-bit systems, especially when using the magic wand with complex selections.