Recently I just transferred a few Joomla 2.5.4 sites to GoDaddy.
However when I go to create a Category, Menu, Article, or even a Custom HTML Module, I am not able to do it because I get the errors or warnings in this case.
this problem even happens inside a Free Joomla 2.5.4 installation.
We are using PHP 5.3 inside a Linux Server from GoDaddy.
Please send me a PM to give you the credentials from my test site, so you can look at the problem yourself.
Then after you analyze the problem, I will need two things from you:
1) how long it will take you to solve this problem
2) how much you will charge for the solution of this problem.