181399 - Text Zoom removes vertical scroll bar until page Reload.

Status: VERIFIED DUPLICATE of bug 173072

(Core :: Layout, defect)

Description

[Justin Smith]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2) Gecko/20021121
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2) Gecko/20021121

Using the Ctrl+- to shrink the page until the vertical scroll bar disappears,
the vertical scroll bar will not reappear when the user uses Ctrl++ to return
the text to the original size.

Reproducible: Always

Steps to Reproduce:
1. http://www.mozilla.org/start/ at resolution 1024x768 
2. Repeatedly tab Ctrl+- (Text Zoom Smaller) until the entire page fits on the
screen and the vertical scroll bar is removed.
3. Use Ctrl++ (Text Zoom Larger)to return page to original size and the vertical
scroll bar does not return.  

Actual Results:  
The area (where the scroll bar should be) is dark grey.

Expected Results:  
The vertical scroll bar should reappear, just as when the page was first rendered.

The mouse wheel will still work to scroll the page. Clicking on the dark grey
area where the scroll buttons should be still works as if the scroll buttons are
there.  However, clicking on the scroll bar (away from the scroll button area)
only works until the end of a page is reached, and then the scroll button area
do not respond either.

I have also witnessed this same problem with the horizontal scroll bar, but not
consistantly.

Comment 1

[Boris Zbarsky [:bzbarsky]]

not a fonts bug.... probably an issue with the viewport not getting correctly
reflown...

Comment 2

[Andrew Schultz]

dupe of "scroll bar missing after text zoom"

*** This bug has been marked as a duplicate of 173072 ***

Comment 3

[Henrik Skupin [:whimboo][⌚️UTC+2]]

verified.