ayase08 -> pun2 needs to be resubmitted as well.

EDIT: or not. Why would the results stop right at the end of the first page?

sokoitu -> shirohebidou same artist who changed Pixiv and home pages. Material from old artist entry has been moved to the new entry.

zerg -> zerg309

Artist's name on pixiv is ZERG309 so, perhaps, it should be moved rather than aliased.
What's more, current tag may also cause a confusion with a certain copyright.

matsukichiii -> matsuda_(matsukichi)
Same artist.

fanfad -> ladfa: "ladfa" is the Pixiv display name and the name used on their doujinshi:
http://doujinshi.mugimugi.org/browse/author/49207/ladfa/
http://www.toranoana.jp/mailorder/article/04/0010/25/53/040010255365.html

kusakabe_(kusakabeworks) <-> kusakabe
Same artist.

black_buraku -> ogi-pote, ogipote or ogi_pote.
This artist changed her name to 荻pote (おぎぽて).

tazaki_satoshi -> tasaki_satoshi.
http://www.madhouse.co.jp/column/mhpf/mhpf_no016.html

sho~taro -> dodai_shouji
Same artist.

yukino_tsubu -> tsuttsu
tsuttsu_(tsux3) -> tsuttsu
According to henmere yukino tsubu was his former circle name. I'm not sure a qualifier is actually needed. If it is I'd rather use his current circle name but I can't find it.

ben_ang -> benjamin_ang
Same artist (moved accounts)

Moved:
zerg -> zerg309
kusakabe -> kusakabe_(kusakabeworks)

Aliased:
lan hallelujah -> blue hallelujah
dreamrabbit -> yuyuzuki_(yume_usagi)
kenntairui -> kentairui
kei_t_sr -> kansou_samehada
sokoitu -> shirohebidou
matsukichiii -> matsuda_(matsukichi)
fanfad -> ladfa
black_buraku ->, ogipote
tazaki_satoshi -> tasaki_satoshi
sho~taro -> dodai_shouji
yukino_tsubu -> tsuttsu
tsuttsu_(tsux3) -> tsuttsu
ben_ang -> benjamin_ang

yoshina hijiki -> noto_(soranoto)
This artist changed her name to のと.

Aliased:
yoshina hijiki -> noto_(soranoto)

jjj14 said:
fanfad -> ladfa: "ladfa" is the Pixiv display name and the name used on their doujinshi:
http://doujinshi.mugimugi.org/browse/author/49207/ladfa/
http://www.toranoana.jp/mailorder/article/04/0010/25/53/040010255365.html

This one was missed.

Huh, weird. Done.

nozumi -> tokira_nozumi.
Reason: The artist's full name.

mochitsuki_ado -> mochizuki_ado
Reason: もちづき あど from his blog.

funky-harem -> Shu-Z
Reason: website name -> nickname

Moved:
nozumi -> tokira_nozumi.

Aliased:
mochitsuki_ado -> mochizuki_ado
funky-harem -> Shu-Z

gogono_panya -> gogono_pan'ya
Reason: Romanization