# MarsEdit 5.4.5 — MarsEdit 5.4.5

- Product: MarsEdit (https://whatsnew.fyi/product/marsedit)
- Vendor: Red Sweater Software
- Date: 2026-08-12
- Version: 5.4.5
- Original notes: https://redsweater.com/marsedit/appcast5.php
- Permalink: https://whatsnew.fyi/product/marsedit/releases/5.4.5
- Labels: Platforms: macOS

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Reduced flickering and reloading of embedded content in the live preview window
- **changed** — Dramatically improved typing and scrolling performance in plain text mode with long posts
- **fixed** — Improved problems that could cause sections of text to have stale syntax highlighting
- **fixed** — Markdown list notation that uses only 2 or 3 spaces per indent is now rendered correctly in the live preview
- **fixed** — Restored expected behavior when preview content is pinned to the bottom while writing a long post
- **fixed** — Restored the ability to use the space key in the main post list to scroll through posts one at a time
- **fixed** — Fixed a bug that could cause long text values to truncate instead of growing the pertinent text field
- **fixed** — Fixed a bug that could cause successful blog refreshes after a failed one to fail to save to disk
- **fixed** — Fixed a bug that could cause a post to publish twice if a network connection drop occurred during posting
- **fixed** — Fixed a bug that could cause an authentication panel to appear repeatedly after canceling it
- **fixed** — Fixed a bug that caused the wrong post to be opened when double clicking shortly after changing the selected blog
- **fixed** — Fixed multiple bugs that could cause a crash when the server returns an unexpected result
- **fixed** — Fixed a number of memory over-usage problems
- **fixed** — Fixed a bug where dragging the last Published image from the Media window failed to add the image to the targeted post
- **fixed** — Fixed a bug that could cause a toolbar icon to appear with inverted colors
- **security** — Improved security when the server tries to redirect from an HTTPS to an HTTP URL
- **fixed** — Posts whose date can't be parsed no longer display and sort as January 1, 2001
- **fixed** — The Crash Reporter now avoids re-submitting old crash logs when the app terminates unexpectedly
- **fixed** — Fixed a bug that caused posts set as Private to be set as Draft instead
- **fixed** — Fixed a bug that could cause posts containing certain phrases to signal a connection error
- **fixed** — Photos attached to a Tumblr post are no longer silently dropped when publishing needs to authenticate or retry

MarsEdit 5.4.5
- Reduced flickering and reloading of embedded content in the live preview window
- Dramatically improved typing and scrolling performance in plain text mode with long posts
- Improvements to problems that could cause sections of text to have stale syntax highlighting
- Markdown list notation that uses only 2 or 3 spaces per indent is now rendered correctly in the live preview
- Restored expected behavior when preview content is “pinned” to the bottom while writing a long post
- Restored the ability to use the space key in the main post list to scroll through posts one at a time
- Fixed a bug that could cause long text values to truncate instead of growing the pertinent text field
- Fixed a bug that could cause successful blog refreshes after a failed one to fail to save to disk
- Fixed a bug that could cause a post to publish twice if a network connection drop occurred during posting
- Fixed a bug that could cause an authentication panel to appear repeatedly after canceling it
- Fixed a bug that caused the wrong post to be opened when double clicking shortly after changing the selected blog
- Fixed multiple bugs that could cause a crash when the server returns an unexpected result
- Fixed a number of memory over-usage problems
- Fixed a bug where dragging the last “Published” image from the Media window failed to add the image to the targeted post
- Fixed a bug that could cause a toolbar icon to appear with inverted colors
- Improved security when the server tries to redirect from an HTTPS to an HTTP URL
- Posts whose date can't be parsed no longer display and sort as January 1, 2001
- The Crash Reporter now avoids re-submitting old crash logs when the app terminates unexpectedly
- Tumblr specific improvements
- Fixed a bug that caused posts set as “Private” to be set as “Draft” instead
- Fixed a bug that could cause posts containing certain phrases to signal a connection error
- Photos attached to a Tumblr post are no longer silently dropped when publishing needs to authenticate or retry