Anyone ever come across this:

We have Drupal running with lots of custom modules, two of which are called 'front' and 'feature'. They worked fine on my local version.

When we moved 'feature' onto our 'testbed' version it refused to appear on the module list, after lots of fiddling (just trying different things).

Now we move 'front' and 'feature' to the live site and neither appear on the module list. We tried everything as far as the server was concerned to no avail, so it did not seem to be a server problem.

We tried all sorts of options, recreating the files, copying contents etc etc. Drupal just wouldn't recognise the names. Eventually we changed the names to xfeature and xfront -- and lo. They appeared. And worked.

Any ideas because we'd like to know why?

Kind regards

Steve