I hate it when that happens...
I hate when your participation in something coincides with issues that have nothing to do with you. Similar to your case of pre-existing errors blamed on you: back in the mid 90's before I hung my own shingle, I worked for another consulting company. I was on a customer site just long enough to install an extra 128 megs of Ram. This particular server had not been restarted in a couple years. I did the all the due diligence and looked at the event logs, closed and compacted all the running databases...and shut down the server. I installed the RAM, closed the case back up and powered it on. The server would POST and show the increased RAM then show the windows NT screen forever, never completing the boot. Of course it was all my fault and I spent that night (Friday of course) undoing a poorly applied NT service pack in order to get it up and running again.
God, NT was a wretched OS. Every Service Pack was like a game of Russian Roulette.