TextPad changes file contents without warngin diff problem

[supernothing]

Hi , anytime I use Textpad to edit source files and then save them textpad alters the contents of most lines making diffs unuseable.
Is there anyway to prevent TextPad changing the contents of the file without telling me?
Specifically it changes whitespace characters etc.
It makes the program unuseable.
Thanks,
B.

[supernothing]

Changed the behaviour in the document classes for java.

[ben_josephs]

In Configure | Preferences | Document Classes | <Class> | Syntax:
deselect Strip trailing spaces from lines when saving
and, under Tabulation,
deselect Convert existing tabs to spaces when saving files.

Alternatively, tell TextPad, when it's comparing the files, to Ignore differences due to: Number of spaces or tabs.

[supernothing]

Hi thanks very much for your reply, that worked fine.
B.