all is in the title.
If I add a data-rel="popup" href="#mypopup" to an A tag of a header button, nothing happens when it is clicked.
I can however do href="$('#mypopup').popup('open')" and that does work.
I'm afraid I cannot reproduce this issue. If you can reproduce it, please create an example showing the problem using the jsbin template and reopen this issue.
Ok I have more information.
I have totally forgot that I set $.mobile.linkBindingEnabled to false because I don't use JQM pagination helpers.
I wonder however if the popups could still be enabled even though the developer wishes to prevent JQM from messing with the regular links ?