number_format annoying error..

[eluser]Unknown[/eluser]
well on my project i was using previous version of php, and then when i shifted to new version of php that is php 5.3, i start getting this error message on Edizle.com.

for time being i put (double) with the first parameter of the function, but i know this is not a perfect solution. is there any other way so that i can prevent errors on the new version of php..???