Topics
Each post starts from an error message I hit on a real system and ends with the fix that resolved it. They are grouped here by the part of the stack the problem lives in.
- Web platform and delivery
5 posts
Cloudflare, DNS and Search Console: email that is accepted and then refused, custom domains that answer 522, bot scoring that rejects headless browsers, and a phishing flag on a site with no login.
- APIs and automation
10 posts
REST APIs that answer with the wrong status code, request shapes that changed between versions, authentication transports that silently differ, and clients that fail before a request leaves the machine.
- Documents and spreadsheets
4 posts
Generating .docx and .xlsx files that survive a real reader: tracked changes, page setup, merged cells, and why converted PDFs are not templates.
- Windows and WSL
3 posts
Filesystem mounts that exist but cannot serve I/O, drive letters WSL2 refuses to read, and where Windows desktop apps actually keep their data.
- Servers and infrastructure
3 posts
Container registries, SSH transports, and version control on machines you do not fully administer - including the errors that are permission problems and the ones that only look like them.