Figure placed on a separate page is centered and not on top

Question

I have multiple figures placed in my document (all of which are using [htbp], [ht] etc. and are placed correctly). The last figure receives a separate page (which is alright) but it's centered on this page, which looks weird as the figure is quite small.

Is there any way to get this figure on top of this page? As written above, its a separate page and the last one in this chapter.

I can't really provide a minimal example (since I guess that the position depends on my previous figures), but here's the code I use for the figure (I've tried [ht], [ht!], [htbp] etc but none of them work - I've also deleted the .aux files before compiling):

\begin{figure}[t!]
\centering
\begin{tabularx}{\columnwidth}{cc}
\subfloat[Results 1]
{ \centering    \includegraphics[width=0.47\textwidth,height=0.47\textheight,keepaspectratio]{images/plot1}
}
&
\subfloat[Results 2]
{ \centering    \includegraphics[width=0.47\textwidth,height=0.47\textheight,keepaspectratio]{images/plot2}
}
\end{tabularx}
\caption{Blabla}
\end{figure}

Thanks in advance!

Answer 1

Just place a large enough \vspace after the caption to push it to the top. Specifying the \vspace too large is OK. Here, I place a figure on a [p] page to guarantee the "bad" behavior, but add a 128inch \vspace after the caption, exaggerated to make the point that the actual length is immaterial, if it is large enough to do the trick.

\documentclass{article}
\usepackage[demo]{graphicx}
\begin{document}
\begin{figure}[p]
\centering
\includegraphics[width=0.47\textwidth,height=0.47\textheight]{file}
\caption{Blabla}
\vspace{128in}
\end{figure}
\end{document}

To avoid the "warning" that comes from a too-large float (if that bothers you), one could add negative \vspace prior to the figure contents, as in

\documentclass{article}
\usepackage[demo]{graphicx}
\begin{document}
\begin{figure}[p]
\vspace{-128in}
\centering
\includegraphics[width=0.47\textwidth,height=0.47\textheight]{file}
\caption{Blabla}
\end{figure}
\end{document}

Answer 2

As tohecz pointed out, this is the general and correct behavior. But you can change this by using

\makeatletter
\setlength{\@fptop}{0pt}
\makeatother

as found here, following the answer to a similar question.