amen.
worked a 14 hour shift on Wednesday trying to troubleshoot a problem that our server admins swore up and down was a storage problem... turned out the next day, when a better server admin came on shift, it ended up being an issue with the apache config, not their SAN storage.
I had to call my vendor tech support guy on Thursday morning to apologize and thank him profusely for all the needless troubleshooting with me.
bummed that I only get a 2-day weekend this week instead of my usual 3-days... gotta work on Monday to cover for an SOB taking vacation

at least it'll be a couple hundred $$'s in OT.