If Composr is reporting PHP 5.2 is running, PHP 5.2 definitely is running. If the hosting control panel is set otherwise, that'd be a bug outside the scope of Composr.
The bug you found on PHP 5.2 is a known issue, and there's a hotfix been posted for it.
Connection reset errors would indicate a hosting stability issue.
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#3496 - Image/template loading issues (Firefox)
The bug you found on PHP 5.2 is a known issue, and there's a hotfix been posted for it.
Connection reset errors would indicate a hosting stability issue.