As a general announcement, we are aware that factions at the moment are behaving in a less than ideal manner, with many characters being hostile to, or friendly to, random factions. We are looking into the cause of this, and have reset the server several times to try to fix it, but nothing has worked thus far. If you see a DM on, feel free to ask one of us to manually fix you in the meantime. Thanks!
The first thing you could do is report it on the DM channel, but if no one responds, then either post it to the "Bug Reports" thread in the Thain Technical forum on these boards, or PM a DM or administrator with as many details as you can. What you should not do is exploit the bug in any way (deliberately gain an advantage from it), as doing so will be disciplined severely.