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Strange FontLab bug: When I make a guideline global, and select the property "visual descender", the font window view suddenly changes, all characters become much bigger, filling their cells completely, like this:

Has anyone else experienced this?
I'm using FontLab 5.0.4 on Win7. The bug is gone in the 5.2 prerelease, but that is not usable yet, sadly.
15 Jan 2013 — 8:55am
... and by "after I while" I mean several days. Restarting FontLab has no effect.
And it has nothing to do with the font file, obviously, because now all fonts I open in FontLab looks like this. Sigh.
Edit: After opening twenty or so fonts, everything suddenly became normal again.
15 Jan 2013 — 12:43pm
What you experienced in 5.04 is actually normal behavior. Using the guideline you have set the Tools > Options > Glyph window > Dimensions > Visual descender parameter. Removing the guideline doesn't change options. If you cannot reproduce this in v5.2 then this is a bug in 5.2.
15 Jan 2013 — 12:53pm
Sindre, this reminds me fondly of the Adobe tech support lady I hope to one day meet and strangle, who congratulated me on "finding an undocumented feature" in Photoshop... No matter how much I pressured she refused to use the B-word. She probably works for Apple now.
hhp
15 Jan 2013 — 1:04pm
Objection, Your Honor :)
FLS5MacManual reads on page 444:
"Global guidelines have an additional set of commands located in the
Guideline Is submenu. By selecting the commands in this submenu you
can set the font parameters: Ascender, Descender, Caps Height, x Height
or Visual Ascender and Descender that are used to set 100% zoom in the
Glyph Window."
Visual Ascender and Descender are described on page 77.
Regards,
Johnych
15 Jan 2013 — 1:11pm
Objection sustained. ;-)
The fond reminiscence remains nonetheless.
hhp
15 Jan 2013 — 1:17pm
I see. Thank you. But why did it then reset itself after opening twenty fonts? This is really confusing. I must have misunderstood the concept of visual ascender and descender.
What a fantastic example of corporate Newspeak! I bet they maintain lists.
15 Jan 2013 — 1:19pm
Thank you, Johnych. Much appreciated.
15 Jan 2013 — 1:46pm
I can only guess. You could reset FLS options to defaults at some point.
Regards,
Johnych
15 Jan 2013 — 2:05pm
A friend of mine recently went to an Apple Store to have a virus removed from his laptop. On his first trip they refused to acknowledge his problem. I convinced him to go back and be a bit more loud... Then they finally helped him clean the virus out, but apparently insisted on calling it "the undesirable software"...
hhp