Since we already know the problem is someplace in your user profile, I'd be tempted to uninstall again and delete the user folders associated with Illustrator, or run the clean tool, before reinstalling.
We are having the same issue. Power Mac 2.8 Quad Core running 10.6.8.
It is template layers and below, possibly because of the italic font used? Does anyone know which font should be installed to display the italic layer name properly?
THE SOLUTION IS
I had this same issue happen. In OS X the problem is usually verdana font. I didn't have it installed. When the italics version isn't installed it makes all the fonts dissapear in the layers palette so long as you have one layer set to not print. That would normally display an italicized layer name but because it can't it makes all of the lables dissapear.
Once u do that you have to restart illustrator. If you have any font management software maybe u should disable it for the time being to make sure it's not interfering with the way verdana works because the font definitely is verdana. I had this problem before in beta and someone answerd it but adobe scrapped the beta forum but it was cached. When it happend the second time I knew what it was but forgot what the name of the font was so I decide to put it here (in case anyone needs it or I forget again.)
Fantastic! Thank you. Recently moved over to new MacMini with OS X 10.8.2 and updated to Suitcase Fusion 4 (which tells you how to optimise font locations - in the process breaking my system!). I made Verdana (all weights/style) active permanently and layers panel now works. What was odd for me was a new document worked fine, but opening a previous document (created in CS6 wouldn't work). Switching Verdana font off the layers panel instantly stops working. Adobe support were terrible, gave up waiting on telephone queue for 35min! and online chat were no help too. Huge thank you.
Thanks to all of you who identified a duplicate or problem with fonts. Mine was a corrupt Helvetica Neue with duplicates and Myriad Pro which had to be reloaded. I can now see the palettes.
So much for the guy named Wade, who was so sure he was right. He wasn't even close.
In response to question/statement:
On the first layer with a missing name double click on the thumbnail. In the layer options make sure "print" is checked. This should make all the layers visable again.
This was EXACTLY what fixed the problem on mine. The top layer was turned off and non-printing.
I turned the layer back to visible, checked the previously un-checked PRINT box back to printable, and reset the layer back to non-visible. Problem solved. All layer names now visible. Come on, Adobe... issue an update and fix this!
sadly this solution was presented last year. . . . .
CS6 Illustrator layers interface (labels and icons) - appear / disappear
1. Open layer panel
2. Double click layer icon above the affected layer(s) object(s) that do not show in the layers panel
3. Enable print
Layer interface data re-appears. This influence cascades to any layers & objects below toggled layer print/noprint
Further testing for the tech boys
anyway I have other things to do today ... so fix it Adobe
Many of the suggestions are bogus and don't resolve the problem. I found the
solution for my problem by making sure the native fonts were active and they
were not. Once I activated the system fonts that were deactivated, the
problem was resolved.
Microsoft Office 2011 is the cause of problem as soon as you install, it will make Ai to act, it is replacing Verdana to MS 5.02 version of font and kills the itlic Verdana which AI is looking for. Here is what I did to fix the issue and it worked. Remove Verdana fonts from Hard Drive > Library > Fonts folder. From the Finder select Finder > Secure Empty Trash. Use Apple's Font Book to look at "All Fonts" and search for Verdana, then right-mouse click on "Verdana" and select "Enable 'Verdana' Family." Quit Font Book. Note : if you have a third party fonts management software like Suitcase please make sure it is activated permanently. Verdana is in apple system font . Good luck .
Same issue here. Layers disappear when one layer is set to 'template' [or nonprinting, which is a necessary function of 'template']. On the suggestion of a poster in a different forum threat, I re-installed the Verdana family of fonts (regular, italic, bold italic, bold…all in a TrueType TTF format) in the fonts directory of my library (system / library / fonts). Restarted the computer. Problem is solved.
Europe, Middle East and Africa