Is there any way to persuade Eclipse to use tabs instead of spaces for indenting its built-in Java content assist proposals (such as when creating an empty method which over
I also had this problem. The issue turned out to be some configuration that was buried somewhere in my workspace. I created a new workspace and reimported my project and my tabs were not converted to spaces any more.
Even after setting Insert spaces for tabs option in Text Editor preferences AND setting my Formatter profile Tab policy to Spaces only Eclipse was still inserting tab characters. Only after removing all the tabs from the file did it properly insert spaces for tabs. After discovering this, I determined the Insert spaces for tabs option in Text Editor preferences doesn't seem to have any effect, and it's the change to the Formatter profile Tab policy that achieves the desired results.
I made sure that Edit>Smart Insert Mode was NOT checked, and that seemed to help me when configuration the indentation and formatting settings did not work. Running Eclipse 3.7.0.