10.6 ? ok well granted i'm not on leopard but I didn't think they'd released a new major update going from 10.5 to 10.6? only help i can offer is you may have to clear the update programs cache and re download them, but i've no clue where the cache for it is.
I'm not too happy with my comp I got at the start of 2008, so I'm gonna change parts of it... currently it's a Win XP box with AMD Athlon x2 64 5600+ I think thats 2.8Ghz or something. Gigabyte GA-M52S-S3P and a Sapphire ATI Radeon HD 2600 pro. so next month hopefully I'm gonna change a few parts to a MSI K9A2 Platinum 790FX mobo a AMD Phenom X4 9950 and two Radeon HD 4670 in crossfire X i'll also get a quieter psu I'll keep the 2Gb of ram I have for now