if i could also add:
BEFORE you go to pk channel (while you're on normal) place everything in your bank and buy cheaper equipment.
THAN and only than will you fully be safe to enter pk channel and not have a risk of losing your equipment. once you have done that and are on pk channel, if you get the inventory bug you will only lose the cheapo stuff you had, and probably anything you picked up since then.
If you pick up items you'd like to keep (bloody weapons etc) DO NOT PLACE THEM IN BANK WHILE ON PK CHANNEL. Log out and rush to bank on CHANNEL 1-1 (Normal). Any item placed in bank on the pk server runs the risk of wiping your bank inventory as well.
Info thankfully brought to you buy Eber and Dex
Added (2009-02-24, 10:54 Pm)
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PS. to be safe, same applies to money