I can assume that 'Please enter summary' text was included in the bug report template to remind people they should enter a summary of the bug they're reporting and not just "tag" it with e.g. '[arptables]'. I don't know when exactly was this introduced, but in the past month I've noticed several bug reports with titles like '[arptables] PLEASE ENTER SUMMARY'.
The titles have sometimes been fixed by the person the reports got assigned to and 13 such reports out of over 500 is not bad: https://bugs.archlinux.org/task/28324 https://bugs.archlinux.org/task/28362 https://bugs.archlinux.org/task/28404 https://bugs.archlinux.org/task/28454 https://bugs.archlinux.org/task/28464 https://bugs.archlinux.org/task/28534 https://bugs.archlinux.org/task/28539 https://bugs.archlinux.org/task/28574 https://bugs.archlinux.org/task/28666 https://bugs.archlinux.org/task/28711 https://bugs.archlinux.org/task/28763 https://bugs.archlinux.org/task/28791 https://bugs.archlinux.org/task/28847
I think the design of our bug reports leaves something to be desired but upstream seems dead http://flyspray.org/ so we have to make do. Is it possible to put the cursor in the summary field to make it clear that this part should be edited?
If such questions should be posted to the bugtracker and not the mailing list, should I file them under Arch Linux project in Web Sites category?