I don't know why you have that problem. I play the game and run a server every day and never heard of it(so I don't think it is a 1.5 issue). Best place to look for an answer is the cs forum ]
here.
However, another solution would be to download and install the fusion pack 7 add on which changes all your player and weaapons skins plus sounds and CROSSHAIRS. I recently went for it and it's a fun change.
You can get that [L=here]http://www.filefront.com/?skin=&transfer=&file=&filepath=/fusionfiles/cs/packs/FusionPackFull7.0.exe&c_key=bqtzfvjwwrdcjkcjxxihrehkybznfgbbwub&catagory=&mirror=&rate=&comments=&new=&top=&sort=&psearch=&sort=&slow=&shigh=&sp_type=&sg_type=&sf_rating=&sg_name=&sf_name=&sf_author=&sf_descrip=&sa_type=&sn_type=&function[/L
However, another solution would be to download and install the fusion pack 7 add on which changes all your player and weaapons skins plus sounds and CROSSHAIRS. I recently went for it and it's a fun change.
You can get that [L=here]http://www.filefront.com/?skin=&transfer=&file=&filepath=/fusionfiles/cs/packs/FusionPackFull7.0.exe&c_key=bqtzfvjwwrdcjkcjxxihrehkybznfgbbwub&catagory=&mirror=&rate=&comments=&new=&top=&sort=&psearch=&sort=&slow=&shigh=&sp_type=&sg_type=&sf_rating=&sg_name=&sf_name=&sf_author=&sf_descrip=&sa_type=&sn_type=&function[/L