According to Weezer's official web site, www.weezer.net, bass player Mikey Welsh has taken leave of the band indefinitely due to some mystery illness. The site's webmaster, Karl Koch, posted a announcement explaining the situation yesterday ñ "I've learned that Mikey has not come to rehearsals in L.A. yet, due to some sort of private medical problem (no, not a cliche rock-star drug problem!). He has been holed up in Boston near his family. The rest of the guys are waiting for word, but have decided that there's so much work coming up for the band that they had better try out some bass players in case Mikey can't make it...it's extremely difficult." Meanwhile, the remainder of the band is in L.A. shooting the second video for "Island In The Sun" with Spike Jonze (nobody liked the first one).