NEW YORK (CNN/Money) – The Senate Finance Committee on Thursday postponed its vote on a $68.8 billion, five-year tax reconciliation bill, according to published reports.

The sticking point: a provision that would extend the tax cut on capital gains and dividends through 2009, according to reports in Tax Notes and the Wall Street Journal.

There is speculation that committee member Olympia Snowe (R-Me.) remains concerned about the provision, although a spokesman from her office said, "I wouldn't say she's outright opposed."

A senior committee staff member told Tax Notes that the earliest the vote could be rescheduled would be Monday, Nov. 14.

Originally there was talk that the bill's chief proponent, Finance Committee chairman Charles Grassley (R-Iowa), would include a provision that called for a two-year extension of the capital gains and dividend tax rate cut, currently set to expire at the end of 2008.

But his final proposal, released on Tuesday, only included a one-year extension. If approved, capital gains and dividends would continue to be taxed through 2009 at 15 percent (5 percent for low and middle-income taxpayers, reduced to 0 percent in 2008).

For a look at other provisions in his bill, click here.

A tax reconciliation bill is due out from the House Ways and Means Committee next week, which is expected to contain a provision that would extend the investment tax cut for two years.

Opponents of the measure say it's hard to justify an extension of a tax break that disproportionately benefits higher income taxpayers when lawmakers, under pressure to reduce the deficit, are also proposing to cut spending on programs like Medicaid and food stamps, which affect the poor and working poor.

What's unclear is whether the House version will also include a provision that offers continued AMT relief to prevent an additional 16 million taxpayers from being subject to the tax, originally intended for the very wealthy. Grassley's package does include an AMT relief provision.