Absolutely. The same is true for bug reports: if you always approach any bug report with the
possibility that it may be your mistake, 1) you avoid annoying someone if it is your mistake, and might actually get helpful advice, and 2) you're more likely to get a cordial reception for real bugs.
You don't have to be excessively self-effacing about it, just avoid presenting things as though the project you're reporting it to being at fault is the only possible conclusion.
