This works with ggplot2 0.9.2.1

ggplot2 theme_minimal

library(grid)

theme_minimal <- function (base_size = 12, base_family = "")
{
  theme_bw(base_size = base_size, base_family = base_family) %+replace%
    theme (
      axis.text.x = element_text(family = base_family, size = base_size * 0.8, lineheight = 0.9, vjust = 1, angle=0),
      axis.text.y = element_text(family = base_family, size = base_size * 0.8, lineheight = 0.9, hjust = 1, angle=0), 
      axis.ticks = element_line(colour = "black", size = 0.2), 
      axis.title.x = element_text(family = base_family, size = base_size, vjust = 0, angle=0), 
      axis.title.y = element_text(family = base_family, size = base_size, angle = 90, vjust = 0.5), 
      axis.ticks.length = unit(0.3, "lines"), 
      axis.ticks.margin = unit(0.5, "lines"), 
      legend.background = element_rect(colour = NA),
      legend.margin = unit(0.2, "cm"), legend.key = element_rect(colour = NA),
      legend.key.size = unit(1.2, "lines"), legend.key.height = NULL,
      legend.key.width = NULL, 
      legend.text = element_text(family = base_family, size = base_size * 0.8, angle=0), 
      legend.text.align = NULL,
      legend.title = element_text(family = base_family, size = base_size * 0.8, face = "bold", hjust = 0, angle=0), 
      legend.title.align = NULL,
      legend.position = "right", 
      legend.direction = "vertical", 
      legend.justification = "center",
      legend.box = NULL, 
      panel.background = element_rect(fill = "white", colour = NA), 
      panel.border = element_rect(fill = NA, colour = "grey90"), 
      panel.grid.major = element_line(colour = "grey90", size = 0.2), 
      panel.grid.minor = element_line(colour = "grey98", size = 0.5), 
      panel.margin = unit(0.25, "lines"),
      strip.background = element_rect(fill = NA, colour = NA),
      strip.text.x = element_text(family = base_family, size = base_size * 0.8, angle=0), 
      strip.text.y = element_text(family = base_family, size = base_size * 0.8, angle = -90), 
      plot.background = element_rect(colour = NA),
      plot.title = element_text(family = base_family, size = base_size * 1.2, angle=0), 
      plot.margin = unit(c(1, 1, 0.5, 0.5), "lines")
  )
}

theme_set(theme_minimal())