Grediah found a wonderfully humourous bug that let you "drop 100 gold in item"
regardless of what the item was, and could therefore carry any amount of money
weightless in any item indefinitely. He should be complimented on finding such
an unusual glitch and reporting it at once.
If the fix to this bug has caused any items (notably purses) that is meant to
carry money, but no longer can, let me (or any other wizard) know at once.