I apologize for the late reply. Here it is, for what it's worth.
What version of PSPad are you using (latest stable or latest beta) ? What kind of issues have you been having ?
I'm usually using the latest beta release. Problems I saw was mostly minor annoying UI quirks, text rendering bugs, nothing major.
Making big changes to the syntax highlighting is annoying, because you need to set the BG color to every freaking rule for every freaking filetype. There are some shortcuts, but it's still not a "do it in just an hour" kind of job.
Can you comment on PSPas vs. Notepad++ ?
I also feel that NP++ has too many features, too little self-consistency, and a poorly-organized configuration interface (i.e. the menus suck.) It feels like I'm using a text editor with several kitchen sinks crudely duct-taped to it. If I wanted that, I'd use emacs.
Also, last time I checked, NP++ doesn't allow for extending the editor via scripting. PSPad does, via Windows Scripting Host.
What programming language do you use it for ?
I've been looking at 3 similar softwares: UltraEdit32, Notepad++ and PSPad, I've not been able to test them thoroughly, I need a good tool for COBOL programming, UltraEdit seams nice, but is not freeware, so I'm looking more at Notepad++ vs. PSPad...
The latest seams to me like a more "professional" tool, don't know if you agree...
I registered and used UltraEdit for a while, then I switched to PSPad. To be honest, I didn't have a good reason to ditch UE except that it didn't feel like an editor I wanted. It's certainly full-featured, and better-designed than NP++.
If you want a kick-butt editor, and I mean serious no-holds-barred editing awesomeness (not to mention USB-portable), I'd recommend Visual SlickEdit. It's very pricey, but I used it for five years without complaint. YMMV, of course.
And, for what it's worth, I'm still using PSPad. I invested far too much time in getting syntax highlighting right to give up on it now!
Hope that helps.