I'm a lesbian transwoman and I've had mostly no trouble among the lesbian community around where I live and at my university. Most of them know I'm trans, but still see me entirely as being another one of the girls who likes girls. My current gf is also a GG lesbian and is put off by what I still have between my legs, but that only puts her off in a purely sexual since, and I'm not really interested in using it for sex anyway, so it hasn't really affected us.
I have, however, encountered lesbian communities where there are many prevailing negative views of transwomen. There was a lesbian chatroom I frequented for a while where the topic of transwomen came up, and there was a very negative connotation to the whole discussion, and one girl in particular went on at great lengths about the evils of transwomen when I attempted to voice some positive things about transwomen and why some of the negative things they'd been saying weren't true (Note: I was not actually out as trans in this chat room, to them I was just another GG Lesbian).
Most of it, though, seems to stem from a lack of understanding and information on what it means to be trans and what the process of transition results in.