### Bug description

When exporting a two-column slide to PDF, the columns are misaligned in the output (HTML is fine).

If the respective bodies contain more content, the content of the right side is pushed to the next slide.

Same issue when using `decktape` 3.4.1.

- macOS
- Chromium 104.0.5112.81

````r
---
title: "Untitled"
format: revealjs
editor: visual
---

## Quarto

:::: {.columns}

::: {.column width="30%"}
Left column
:::

::: {.column width="50%"}
Right column
:::

::::

```` 


![image](https://user-images.githubusercontent.com/8430564/185238662-a0ae9c91-3288-47f7-afe8-911ef3ed111a.png)



### `quarto check` Output

```bash
[✓] Checking Quarto installation......OK
      Version: 1.1.75
      Path: /opt/homebrew/Cellar/quarto-dev/1.1.75/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.10.6
      Path: /opt/homebrew/opt/python@3.10/bin/python3.10
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with python3 -m pip install jupyter

[✓] Checking R installation...........OK
      Version: 4.2.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Users/pjs/Library/R/arm64/4.2/library
        - /opt/R/4.2.1-arm64/Resources/site-library
        - /opt/R/4.2.1-arm64/Resources/library
      rmarkdown: 2.15

[✓] Checking Knitr engine render......OK
```

### `quarto tools check` Output

```bash
[✓] Inspecting tools

Tool         Status            Installed     Latest  
chromium     Not installed     ---           869685  
tinytex      Not installed     ---           v2022.08
```

### Checklist

- [X] [formatted your issue](https://yihui.org/issue/#please-format-your-issue-correctly) so it is easier for us to read?
- [X] included a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] documented the quarto version you're running, by pasting the output from running `quarto check` in the "Quarto Check Output" text area?
- [X] documented the version of the quarto tools you're running, by providing the output from running `quarto tools check` in the "Quarto Tools Check Output" text area?
- [ ] documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] documented which operating system you're running? If on Linux, please provide the specific distribution as well.
- [X] upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?
cderv
2022-08-17T20:45:06Z
pat-s
bug revealjs
v1.4
open
Presentation - PDF export: columns misaligned
https://github.com/quarto-dev/quarto-cli/issues/1952