Revenue is to describe sales coming in for the company and profits before tax is after subtracting their operational costs and financial costs. Net profit after tax will be divided among all the shares to get the EPS.

Likely scenario where Revenue increase but EPS drop, like in the case of BJTOTO recently is due to their higher operational costs. Where revenue actually increase higher than previous quarter but EPS is lower.

If revenue and profit before tax increases but EPS still drop, likely due to some tax issue as in the case of YTLPOWER during their 4Q2009 report where their recognition of some tax in their accounts completely decimated their EPS for that quarter.

And another is that revenue, profit before tax and net profits increased but EPS goes down, is most likely what htt explained. New share issue which dilutes the EPS as more shares are introduced to the market. New shares can be issued via bonus issue, rights/warrants, ESOS, bond conversion, ICULS, etc.

Best is always read the notes of a quarterly report which normally would describe and explain why the numbers are different. While most companies give general answers and explanations, some do make an effort to add some detail for their investors. Never judge a company's performance from a newspaper/financial websites headlines as most of it is generally misleading.  Always read the report yourself and do some number crunching for your own conclusion.