If you add a Guide and delete it, it will automatically show up again after you re-open your project. I believe this was introduced in 15.08. Reproducible: Always Steps to Reproduce: 1. Make a project 2. Add a Guide 3. Delete the Guide 4. Close kdenlive and open your project again Actual Results: The Guide will be there again, even tho you deleted it. Expected Results: The Guide should not appear anymore.
I can confirm this happens to me also. However it doesn't happen all the time guaranteed so it makes it hard to gives steps to reproduce. If I keep deleting the guides (either individually or selecting "Delete All Guides"), save/reopen/repeat the project, the guides will eventually go away.
Git commit 513526314e3f7893a8fd8c7b1b3bf4ce91974257 by Jean-Baptiste Mardelle. Committed on 29/10/2015 at 22:52. Pushed by mardelle into branch 'master'. This should fix the guides not correctly deleted from project, please test M +18 -2 src/mltcontroller/bincontroller.cpp http://commits.kde.org/kdenlive/513526314e3f7893a8fd8c7b1b3bf4ce91974257
SUCCESS I just tested from GIT and I was not able to reproduce the problem.