Today I came across the "Failed to write file to disk" error on my blog, despite,using the latest version of WordPress and not having changed any settings or updated any plugins.
I am using the latest version of Flash. I am also very ignorant when it comes to some of the technical stuff and in awe of some of the code wizards on this forum.
I could not find a fix for my problem so I used a workaround. So as to help people with this frustrating problem I wrote a blog post about it. If you want to read it, here it is:
Fix (workaround) for WordPress “Failed to write file to disk” image upload error.
The workaround does involve a commercial solution, however I expect you could use a free one instead.