Hi everybody: first font, first problem, first post.
I’ve worked my way designing the glyphs in illustrator and assembling everything in fontlab, compiling metrics and kerning. I’m now in the testing phase (I’m on a mac) and I noticed a software specific bug, which seems to come up only in some apps, namely apple pages and linotype fontexplorer x. Here’s the problem:

as you can see, everything’s fine in the first unjustified paragraph, but when I test a justified paragraph - the one below - the software screws the tracking (mainly the one of the ’i’) to evenly space the rows. In a former version of the font the same problem affected the letter ’b’, so I deleted the ’b’ glyph and re-pasted from illustrator, re-defined kerning and metrics and recompiled, only to have the ’i’ freaking out this time.

Another couple of things to be noted: if I tweak the tracking a little in pages, the problem seems to fix itself at random values; using the same font in NeoOffice and making a justified paragraph doesn’t cause any problems or visible bugs.

So, has anybody any idea of what might be the cause of this bug? Any thoughts or suggestions?

Thank you in advance!