Solaria 1.3 works well on my laptop (P4 2.1 / ATi Radeon 7500 / 520 Ram), I played about 2 hrs no any lag (the only lag was D/L patch1.3 =P)
New buff window looks very good, clear and small =), but the spell book really a little big =P, will try more and feedback later.
[65 Prophet]
Kulala (Wood Elf) <Kylin Eyes> in TN