have you got that brown algae any were in the tank or on the plants,
the feathery one, i sent you should be growing fast bynow, mine has spread almost across the back of the tank, check the leaves to see if there is brown algae on them,
well i'm lost don't no what the prob could be, so i think rose is the best person to help with this, i've got the green in my tank but it dose'nt cause probs with the plants, infact i leave it on the rear of the tank and
on stones, i think it adds to a natural look,
UPDATE Afew days ago i noticed some of the 'buds' had dissappeared from the wierd java stem, then i noticed a bud casing sloating empty at the top, then today i noticed a bright green 'seed' on the bottom with shoots coming up from it, at first i thort it was roots from another plant, but i found another 'seed' on its own, so i can only assume i have baby java' kool eh ?
he he, the 'old' java fern leaves havent frown a millimerter lol just that wierd stem grew, and not if all those buds are seeds, then theres like about 10 more