This is for a tech support or customer support case. I need a single-word tag labeling other people who share my issue.
How about "commiserators"? Not exactly what you're looking for, but it's kind of close.
Commiserate - to feel or express sympathy
Although I feel the connotations are usually more along the lines of what you are looking for.
Commiserate (v.intr.) To feel or express sympathy: commiserated over their failure.
There's a whole vocabulary for such issues in ITIL. You are referring to several incidents with a common problem. For anyone doing your kind of job I would really recommend an ITIL fundamentals course. http://en.wikipedia.org/wiki/Information_Technology_Infrastructure_Library
and in particular http://en.wikipedia.org/wiki/Incident_management_%28ITSM%29
A grasp of the key terms is essential if you're looking at reviews of any kind of service desk, CMDB, problem tracking etc software.
eta: sorry, just re-read and saw you're a customer. It's late. Anyway hopeful the site's admins have heard of ITIL
New York Times reports:
There has always been, at the very least, a little bit of hate between blacks and whites in this country, with each side, in its turn, taking advantage of its political strength (as who does not?). But that relationship is also perhaps like a marriage. Both sides at different times are bitching, and both at different times are bailing, but we’re all in the same boat.
We are bound to each other, as are all Americans. Bound though subdivided, not only by race, but by religion, politics, age, region and culture. And we not only seem to be but are working it out.
Here "we’re all in the same boat" means people who have the same issue/problem; hence a single-word tag labeling "other people who share my issue" might be "navigant" (or "navigator"); althoug I suggest you "NAVIGATOR-ADVICE", which is more comprensible.
I think agreers might work as the word.
This is a word used to group people, used in demographics. Secondly, the word is for a group people who share the same problem. Co-complainant/issue-brothers etc., while not incorrect, didn't seem intuitive. Thirdly, I tried to apply agreers in possible contexts related to problem sharing, and found it fit.