Ctb - I don't find the cables fragile at at. AC offers a flat design and non-flat design (Serpent series). If you're not careful you can put bends or crinkles in the flat cables (which generally won't break them or even affect the sound), but overall they are pretty flexible and AC even recommends you can place them under carpet or behind baseboards.
As for the amp issue, it is well known and mentioned on several threads here that the zobel networks are a safe bet to use with these cables. Especially with solid state amps. Something to do with the cables capacitance forces some amps into oscillation. The zobels are supplied free by AC and you can have them integrated into the cable design of you like. Look for posts on the subject by Audiogon member Sean.
As for the amp issue, it is well known and mentioned on several threads here that the zobel networks are a safe bet to use with these cables. Especially with solid state amps. Something to do with the cables capacitance forces some amps into oscillation. The zobels are supplied free by AC and you can have them integrated into the cable design of you like. Look for posts on the subject by Audiogon member Sean.