A large number of our LCD screen have blobs on them. As they as still under warranty, we called up the vendor and got some replacements. Now, we're a rather large uhm customer.. so you would assume that they wouldn't send us refurbished screens. They didn't. They sent us broken refurbished screens. Some had missing filters, some just went into powersave after 2 minutes (even with powersave disabled), some still had blobs. When we sent THOSE back, we got replacements of a completly different type and without a brackets. Obviously, those screens don't fit in a 4-screen multihead set. *UGH*