Internal Server Error 500 after php5.3.4 installed by hostingcompany

[kuroi]

I would run fast and far from this host.

I don't claim to be an expert in this area and so am happy to be proven wrong, but if you're reporting accurately what they're telling you, it sounds like complete nonsense.

Firstly, in so far as there is such a thing as PHP 5.3, it includes version 5.3.4.

I suspect that what they are describing here is the warning messages that started being output in with PHP 5.3.0 to warn people when they were using features that were going to be withdrawn in future versions. And it is possible to suppress them by adding an instruction to your php.ini file.

However, if that is what they're talking about, it's evidence that they don't know what they're doing, since that's not a bug. The warnings are completely intentional. And anyway, I don't see how this could contribute to the 500 Internal Server Errors that you're reporting.

Maybe somebody else will see a connection, but it sounds to me as though they're trying to apply a solution that worked for them to solve a different problem, without actually knowing what the real problem is here. And just spraying around solutions without a proper diagnosis of the problem can be very dangerous.