Almost.
The default behaviour of jEdit is a two-stage-save.
Thereby the file is saved to a temporary file first ("#<filename>#save#"). Then the old file is deleted and the temporary file is renamed to the intended filename.
That is, because if there is an error while saving the file, the original, last saved, file is still available.
In some distinct situations while the renaming of the temporary file, there could be problems and then that Exception is thrown. If you want to see it in the source, look at BufferIORequest.save() and FileVFS._rename()
But you can deactivate this two-stage-save to direct saving in the global options. That could help with your problem.

I'm getting this same error when saving a file, and as others have noted, it seems random. Sometimes the error will appear, sometimes it won't, and waiting a little while and attempting to save again will often work. Here are the files in the directory:

• #style.css#save#
• style.css
• style.css~
• #style.css#

Would it make any difference that the files are stored within a web directory of a local ColdFusion server? I'm running WinXP SP2, jEdit 4.2final, and the latest Java runtimes. And yes, disabling the two-stage save does eliminate this problem, but I'd prefer it to leave it on if possible. Is there any other way around this problem? Thanks! (Btw, I'm a new community member... have beein using jEdit for several months, now, and I'm never going back to Dreamweaver, which I used for several years before that.)