Is there a way to disable the previous button for certain groups? Once a respondent makes it past a certain point, I don't want them to be able to go back. I do want to allow them to go back within a cluster of groups. (Essentially, I need meta-groups with no way to go back to a previous meta-group. But I need data from the previous meta-group so I can't make them separate surveys, or?)

This can be done via Javascript. Put in on every page (perhaps in the group section text box as html)
to hide the previous button.

Just a short update as the last post is more than four years old:
It looks as the ID name of the button has changed from "moveprevbtn" to "ls-button-previous" in the present version (3.14). At least in my installation the following code works better:

<style>
#ls-button-previous {
display: none;
}
</style>

f_funke wrote: Just a short update as the last post is more than four years old:
It looks as the ID name of the button has changed from "moveprevbtn" to "ls-button-previous" in the present version (3.14). At least in my installation the following code works better:

Code:

<script type="text/javascript" charset="utf-8">
  $(document).ready(function(){
    $('#ls-button-previous').hide();
  });
</script>

Related to that please have a look at bugs.limesurvey.org/view.php?id=14541 and my attempt to fix this: github.com/LimeSurvey/LimeSurvey/commit/...28fbfabef7639f42d52f

Just an absolutely minor change in order to fix that regression which was not accepted for very doubtful reasons