I was communicating with Kindle Direct Publishing about one of my ebooks that's been running into formatting errors and as part of their response I got the below:
Also, please note, although we used to accept MOBI files created by programs such as Mobipocket Creator and Calibre previously, we no longer support MOBI files created using third party applications such as the one you've used.
If you prefer uploading a MOBI file, we recommend that you use Kindlegen to convert your source file to MOBI format.
You can download Kindlegen here: http://www.amazon.com/gp/feature.htm...cId=1000234621
I hope this information is helpful. Thanks for using Amazon KDP.
So it's time to switch to Kindlegen, correct?