conspicuously or grossly unconventional or unusual; "restaurants of bizarre design--one like a hat, another like a rabbit"; "famed for his eccentric spelling"; "a freakish combination of styles"; "his off-the-wall antics"; "the outlandish clothes of teenagers"; "outre and affected stage antics"
From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)
(Or "flakey") Subject to frequent lossage. This use is of course related to the common slang use of the word to describe a person as eccentric, crazy, or just unreliable. A system that is flaky is working, sort of - enough that you are tempted to try to use it - but fails frequently enough that the odds in favour of finishing what you start are low. Commonwealth hackish prefers dodgy.